./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.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_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya --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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:58:51,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:58:51,706 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:58:51,711 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:58:51,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:58:51,737 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:58:51,738 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:58:51,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:58:51,739 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:58:51,740 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:58:51,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:58:51,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:58:51,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:58:51,742 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:58:51,743 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:58:51,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:58:51,744 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:58:51,744 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:58:51,745 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:58:51,745 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:58:51,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:58:51,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:58:51,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:58:51,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:58:51,748 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:58:51,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:58:51,749 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:58:51,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:58:51,750 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:58:51,750 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:58:51,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:58:51,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:58:51,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:58:51,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:58:51,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:58:51,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:58:51,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:58:51,753 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:58:51,753 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:58:51,753 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:58:51,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:58:51,754 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:58:51,754 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_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2023-11-29 04:58:51,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:58:52,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:58:52,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:58:52,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:58:52,026 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:58:52,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-29 04:58:54,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:58:55,199 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:58:55,200 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-29 04:58:55,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/data/a96e71706/462b171563384b9f8aea5cbd008542cc/FLAGd5aa3831e [2023-11-29 04:58:55,229 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/data/a96e71706/462b171563384b9f8aea5cbd008542cc [2023-11-29 04:58:55,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:58:55,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:58:55,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:58:55,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:58:55,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:58:55,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564ec32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55, skipping insertion in model container [2023-11-29 04:58:55,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,295 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:58:55,620 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_e11fb16c-6f09-401f-bddd-a1215f3f86cd/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-29 04:58:55,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:58:55,635 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:58:55,682 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_e11fb16c-6f09-401f-bddd-a1215f3f86cd/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-29 04:58:55,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:58:55,714 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:58:55,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55 WrapperNode [2023-11-29 04:58:55,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:58:55,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:58:55,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:58:55,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:58:55,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,763 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-11-29 04:58:55,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:58:55,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:58:55,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:58:55,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:58:55,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,801 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 6, 5]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 4 writes are split as follows [0, 3, 1]. [2023-11-29 04:58:55,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:58:55,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:58:55,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:58:55,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:58:55,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (1/1) ... [2023-11-29 04:58:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:58:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:55,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:58:55,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:58:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-29 04:58:55,896 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-29 04:58:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:58:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-11-29 04:58:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-11-29 04:58:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:58:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:58:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 04:58:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 04:58:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 04:58:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 04:58:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 04:58:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 04:58:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:58:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 04:58:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 04:58:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 04:58:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:58:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:58:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:58:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:58:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:58:56,022 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:58:56,025 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:58:56,053 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-29 04:58:56,230 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:58:56,254 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:58:56,254 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 04:58:56,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:58:56 BoogieIcfgContainer [2023-11-29 04:58:56,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:58:56,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:58:56,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:58:56,260 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:58:56,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:58:55" (1/3) ... [2023-11-29 04:58:56,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33799f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:58:56, skipping insertion in model container [2023-11-29 04:58:56,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:58:55" (2/3) ... [2023-11-29 04:58:56,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33799f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:58:56, skipping insertion in model container [2023-11-29 04:58:56,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:58:56" (3/3) ... [2023-11-29 04:58:56,263 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-11-29 04:58:56,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:58:56,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:58:56,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:58:56,333 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;@78b4f376, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:58:56,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:58:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:58:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 04:58:56,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:58:56,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:56,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:58:56,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2097342563, now seen corresponding path program 1 times [2023-11-29 04:58:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:56,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840852863] [2023-11-29 04:58:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:56,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:56,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:58:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:58:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:58:56,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840852863] [2023-11-29 04:58:56,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840852863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:58:56,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:58:56,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:58:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979849061] [2023-11-29 04:58:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:58:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:58:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:58:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:58:56,585 INFO L87 Difference]: Start difference. First operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:58:56,624 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2023-11-29 04:58:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:58:56,627 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-29 04:58:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:58:56,633 INFO L225 Difference]: With dead ends: 78 [2023-11-29 04:58:56,633 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 04:58:56,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:58:56,640 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:58:56,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:58:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 04:58:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 04:58:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:58:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-29 04:58:56,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2023-11-29 04:58:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:58:56,676 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-29 04:58:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-29 04:58:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:58:56,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:58:56,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:58:56,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:58:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -594563149, now seen corresponding path program 1 times [2023-11-29 04:58:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568339653] [2023-11-29 04:58:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:58:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 04:58:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:58:57,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:57,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568339653] [2023-11-29 04:58:57,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568339653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851572821] [2023-11-29 04:58:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:57,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:57,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:58:57,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:58:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:58:57,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:58:57,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:58:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851572821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:58:57,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:58:57,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-29 04:58:57,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329742836] [2023-11-29 04:58:57,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:58:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:58:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:57,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:58:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:58:57,364 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:58:57,466 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-11-29 04:58:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:58:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-29 04:58:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:58:57,468 INFO L225 Difference]: With dead ends: 59 [2023-11-29 04:58:57,469 INFO L226 Difference]: Without dead ends: 34 [2023-11-29 04:58:57,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:58:57,471 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:58:57,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 156 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:58:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-29 04:58:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-29 04:58:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:58:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-29 04:58:57,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 26 [2023-11-29 04:58:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:58:57,483 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-29 04:58:57,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-29 04:58:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 04:58:57,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:58:57,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:57,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:58:57,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 04:58:57,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:58:57,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 219365868, now seen corresponding path program 1 times [2023-11-29 04:58:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164207757] [2023-11-29 04:58:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:58:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:58:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:58:57,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164207757] [2023-11-29 04:58:57,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164207757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:58:57,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:58:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:58:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923857766] [2023-11-29 04:58:57,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:58:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:58:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:58:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:58:57,867 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:58:57,957 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-11-29 04:58:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:58:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-29 04:58:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:58:57,960 INFO L225 Difference]: With dead ends: 57 [2023-11-29 04:58:57,960 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 04:58:57,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:58:57,962 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:58:57,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:58:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 04:58:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2023-11-29 04:58:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:58:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2023-11-29 04:58:57,972 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 30 [2023-11-29 04:58:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:58:57,973 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2023-11-29 04:58:57,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 04:58:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2023-11-29 04:58:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 04:58:57,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:58:57,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:58:57,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:58:57,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1789025124, now seen corresponding path program 1 times [2023-11-29 04:58:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:57,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13510219] [2023-11-29 04:58:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:58:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:58:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:58:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13510219] [2023-11-29 04:58:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13510219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736281743] [2023-11-29 04:58:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:58,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:58:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:58:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:58,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:58:58,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:58:58,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:58:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736281743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:58:58,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:58:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-29 04:58:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164499479] [2023-11-29 04:58:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:58:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:58:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:58:58,705 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:58:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:58:58,999 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-11-29 04:58:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:58:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-11-29 04:58:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:58:59,003 INFO L225 Difference]: With dead ends: 104 [2023-11-29 04:58:59,004 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 04:58:59,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:58:59,006 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:58:59,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 286 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:58:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 04:58:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2023-11-29 04:58:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:58:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-11-29 04:58:59,017 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2023-11-29 04:58:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:58:59,018 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-11-29 04:58:59,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:58:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-11-29 04:58:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 04:58:59,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:58:59,020 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:59,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:58:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:59,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:58:59,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1014395389, now seen corresponding path program 2 times [2023-11-29 04:58:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618004552] [2023-11-29 04:58:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:58:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:58:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:58:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618004552] [2023-11-29 04:58:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618004552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125769304] [2023-11-29 04:58:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:58:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:59,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:58:59,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:58:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:58:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:58:59,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:58:59,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:59,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:58:59,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 04:58:59,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 04:58:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:58:59,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:59,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 04:58:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 04:58:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:58:59,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125769304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:58:59,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:58:59,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 13 [2023-11-29 04:58:59,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606025978] [2023-11-29 04:58:59,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:59,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:58:59,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:58:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:58:59,967 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:00,222 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-11-29 04:59:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:59:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-11-29 04:59:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:00,224 INFO L225 Difference]: With dead ends: 78 [2023-11-29 04:59:00,224 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 04:59:00,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:59:00,226 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:00,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 317 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:59:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 04:59:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2023-11-29 04:59:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 04:59:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2023-11-29 04:59:00,238 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 35 [2023-11-29 04:59:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:00,239 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2023-11-29 04:59:00,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2023-11-29 04:59:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 04:59:00,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:00,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:00,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:59:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:00,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:00,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1380918427, now seen corresponding path program 3 times [2023-11-29 04:59:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940061549] [2023-11-29 04:59:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:00,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:59:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:59:00,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:00,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940061549] [2023-11-29 04:59:00,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940061549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:00,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614807874] [2023-11-29 04:59:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:59:00,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:00,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:00,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:59:00,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:59:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:00,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:59:00,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:59:01,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:59:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614807874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:01,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:01,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2023-11-29 04:59:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021732928] [2023-11-29 04:59:01,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:01,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:59:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:59:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:59:01,420 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:01,784 INFO L93 Difference]: Finished difference Result 168 states and 225 transitions. [2023-11-29 04:59:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:59:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-29 04:59:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:01,787 INFO L225 Difference]: With dead ends: 168 [2023-11-29 04:59:01,788 INFO L226 Difference]: Without dead ends: 164 [2023-11-29 04:59:01,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:59:01,790 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:01,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 449 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:59:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-29 04:59:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2023-11-29 04:59:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 102 states have internal predecessors, (126), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2023-11-29 04:59:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2023-11-29 04:59:01,817 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 36 [2023-11-29 04:59:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:01,818 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2023-11-29 04:59:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2023-11-29 04:59:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:59:01,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:01,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:01,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:59:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:02,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:02,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash 141769283, now seen corresponding path program 4 times [2023-11-29 04:59:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:02,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629781400] [2023-11-29 04:59:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:59:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:59:02,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629781400] [2023-11-29 04:59:02,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629781400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114855911] [2023-11-29 04:59:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:59:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:02,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:02,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:59:02,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:59:02,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:02,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:59:02,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:02,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 04:59:02,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:59:02,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:59:02,943 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:59:02,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 04:59:03,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 04:59:03,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 04:59:03,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2023-11-29 04:59:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:59:03,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:03,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2023-11-29 04:59:03,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2023-11-29 04:59:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:59:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114855911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:16,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:16,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2023-11-29 04:59:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118912913] [2023-11-29 04:59:16,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:59:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:59:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=402, Unknown=3, NotChecked=0, Total=462 [2023-11-29 04:59:16,178 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:16,853 INFO L93 Difference]: Finished difference Result 175 states and 231 transitions. [2023-11-29 04:59:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:59:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-11-29 04:59:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:16,856 INFO L225 Difference]: With dead ends: 175 [2023-11-29 04:59:16,856 INFO L226 Difference]: Without dead ends: 166 [2023-11-29 04:59:16,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=85, Invalid=562, Unknown=3, NotChecked=0, Total=650 [2023-11-29 04:59:16,858 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:16,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 433 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:59:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-29 04:59:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2023-11-29 04:59:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 132 states have internal predecessors, (160), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2023-11-29 04:59:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2023-11-29 04:59:16,889 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 37 [2023-11-29 04:59:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:16,890 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2023-11-29 04:59:16,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2023-11-29 04:59:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:59:16,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:16,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:16,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 04:59:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:17,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:17,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1235825357, now seen corresponding path program 1 times [2023-11-29 04:59:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:17,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029380132] [2023-11-29 04:59:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:59:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029380132] [2023-11-29 04:59:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029380132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757774478] [2023-11-29 04:59:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:17,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:59:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:17,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:59:17,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:17,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757774478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:18,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:18,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-11-29 04:59:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069558996] [2023-11-29 04:59:18,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:18,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:59:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:59:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:59:18,187 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:59:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:18,869 INFO L93 Difference]: Finished difference Result 287 states and 403 transitions. [2023-11-29 04:59:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:59:18,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-11-29 04:59:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:18,873 INFO L225 Difference]: With dead ends: 287 [2023-11-29 04:59:18,873 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 04:59:18,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:59:18,876 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:18,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 373 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:59:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 04:59:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 167. [2023-11-29 04:59:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 152 states have internal predecessors, (188), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 10 states have call predecessors, (32), 13 states have call successors, (32) [2023-11-29 04:59:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 233 transitions. [2023-11-29 04:59:18,916 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 233 transitions. Word has length 39 [2023-11-29 04:59:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:18,916 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 233 transitions. [2023-11-29 04:59:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:59:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 233 transitions. [2023-11-29 04:59:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:59:18,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:18,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:18,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:59:19,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:19,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:19,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash 649019343, now seen corresponding path program 1 times [2023-11-29 04:59:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:19,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682950346] [2023-11-29 04:59:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:19,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:59:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682950346] [2023-11-29 04:59:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682950346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993665712] [2023-11-29 04:59:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:19,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:19,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:59:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:19,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:59:19,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:19,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:59:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993665712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:59:19,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:59:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-11-29 04:59:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238106205] [2023-11-29 04:59:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:59:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:59:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:59:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:59:19,694 INFO L87 Difference]: Start difference. First operand 167 states and 233 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:59:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:19,825 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2023-11-29 04:59:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:59:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-11-29 04:59:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:19,828 INFO L225 Difference]: With dead ends: 197 [2023-11-29 04:59:19,828 INFO L226 Difference]: Without dead ends: 185 [2023-11-29 04:59:19,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:59:19,830 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:19,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 225 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:59:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-29 04:59:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2023-11-29 04:59:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 154 states have internal predecessors, (192), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 12 states have call predecessors, (32), 13 states have call successors, (32) [2023-11-29 04:59:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2023-11-29 04:59:19,859 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 39 [2023-11-29 04:59:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:19,859 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2023-11-29 04:59:19,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 04:59:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2023-11-29 04:59:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:59:19,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:19,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:19,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:59:20,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:20,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:20,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash -628111627, now seen corresponding path program 2 times [2023-11-29 04:59:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:20,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391053809] [2023-11-29 04:59:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:20,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:20,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:20,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 04:59:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:59:20,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391053809] [2023-11-29 04:59:20,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391053809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851505128] [2023-11-29 04:59:20,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:59:20,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:20,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:20,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:59:20,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:59:20,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:20,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:59:20,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:59:20,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:59:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851505128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:20,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:20,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-29 04:59:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88067655] [2023-11-29 04:59:20,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:20,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:59:20,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:59:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:59:20,729 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:21,069 INFO L93 Difference]: Finished difference Result 240 states and 333 transitions. [2023-11-29 04:59:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:59:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-29 04:59:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:21,072 INFO L225 Difference]: With dead ends: 240 [2023-11-29 04:59:21,072 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 04:59:21,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:59:21,074 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:21,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 361 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:59:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 04:59:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2023-11-29 04:59:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 141 states have (on average 1.297872340425532) internal successors, (183), 147 states have internal predecessors, (183), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2023-11-29 04:59:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2023-11-29 04:59:21,095 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 39 [2023-11-29 04:59:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:21,095 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2023-11-29 04:59:21,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2023-11-29 04:59:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 04:59:21,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:21,097 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:21,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:59:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:21,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:21,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2129541738, now seen corresponding path program 5 times [2023-11-29 04:59:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082223057] [2023-11-29 04:59:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:21,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 04:59:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:59:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082223057] [2023-11-29 04:59:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082223057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287815863] [2023-11-29 04:59:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:59:21,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:21,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:21,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:59:21,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 04:59:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:21,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:59:21,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:59:21,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:59:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287815863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:21,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:21,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2023-11-29 04:59:21,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459527516] [2023-11-29 04:59:21,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:21,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:59:21,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:59:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:59:21,956 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:22,210 INFO L93 Difference]: Finished difference Result 258 states and 358 transitions. [2023-11-29 04:59:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:59:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-29 04:59:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:22,214 INFO L225 Difference]: With dead ends: 258 [2023-11-29 04:59:22,214 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 04:59:22,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:59:22,216 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:22,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 286 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:59:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 04:59:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2023-11-29 04:59:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 131 states have internal predecessors, (163), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-29 04:59:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2023-11-29 04:59:22,233 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 41 [2023-11-29 04:59:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:22,234 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2023-11-29 04:59:22,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2023-11-29 04:59:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:59:22,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:22,235 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:22,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:59:22,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:59:22,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:22,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1890606574, now seen corresponding path program 3 times [2023-11-29 04:59:22,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:22,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170212880] [2023-11-29 04:59:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:22,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:22,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:22,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 04:59:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170212880] [2023-11-29 04:59:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170212880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897421280] [2023-11-29 04:59:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:59:22,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:22,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:22,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:59:23,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:59:23,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:23,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 04:59:23,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:23,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 04:59:23,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:59:23,234 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:59:23,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 04:59:23,297 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 28 treesize of output 16 [2023-11-29 04:59:23,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:59:23,638 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 51 treesize of output 31 [2023-11-29 04:59:23,683 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 7 treesize of output 3 [2023-11-29 04:59:23,746 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 04:59:23,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-11-29 04:59:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:59:23,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:23,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2023-11-29 04:59:23,786 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 33 treesize of output 21 [2023-11-29 04:59:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:24,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897421280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:24,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:24,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 23 [2023-11-29 04:59:24,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657356906] [2023-11-29 04:59:24,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:59:24,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:59:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:59:24,013 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:24,744 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2023-11-29 04:59:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:59:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-11-29 04:59:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:24,746 INFO L225 Difference]: With dead ends: 165 [2023-11-29 04:59:24,746 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 04:59:24,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-11-29 04:59:24,747 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:24,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 642 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:59:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 04:59:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2023-11-29 04:59:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.28125) internal successors, (164), 132 states have internal predecessors, (164), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-29 04:59:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 196 transitions. [2023-11-29 04:59:24,763 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 196 transitions. Word has length 43 [2023-11-29 04:59:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:24,763 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 196 transitions. [2023-11-29 04:59:24,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 04:59:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 196 transitions. [2023-11-29 04:59:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 04:59:24,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:24,764 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:24,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:59:24,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:59:24,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:24,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1520170790, now seen corresponding path program 4 times [2023-11-29 04:59:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837190153] [2023-11-29 04:59:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:25,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:25,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 04:59:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 04:59:25,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837190153] [2023-11-29 04:59:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837190153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137701789] [2023-11-29 04:59:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:59:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:25,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:25,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:59:25,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:59:25,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:25,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:59:25,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 04:59:25,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 04:59:26,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137701789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:26,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:26,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2023-11-29 04:59:26,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761821287] [2023-11-29 04:59:26,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:26,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:59:26,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:26,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:59:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:59:26,244 INFO L87 Difference]: Start difference. First operand 147 states and 196 transitions. Second operand has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:26,965 INFO L93 Difference]: Finished difference Result 269 states and 378 transitions. [2023-11-29 04:59:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:59:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-11-29 04:59:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:26,967 INFO L225 Difference]: With dead ends: 269 [2023-11-29 04:59:26,967 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 04:59:26,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:59:26,969 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 127 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:26,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 912 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:59:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 04:59:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 195. [2023-11-29 04:59:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 171 states have (on average 1.263157894736842) internal successors, (216), 176 states have internal predecessors, (216), 14 states have call successors, (14), 4 states have call predecessors, (14), 9 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2023-11-29 04:59:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 255 transitions. [2023-11-29 04:59:27,004 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 255 transitions. Word has length 44 [2023-11-29 04:59:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:27,005 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 255 transitions. [2023-11-29 04:59:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:59:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 255 transitions. [2023-11-29 04:59:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 04:59:27,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:27,006 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:27,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:59:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:59:27,207 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:27,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 119913326, now seen corresponding path program 5 times [2023-11-29 04:59:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434243676] [2023-11-29 04:59:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:28,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:59:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:28,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 04:59:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:59:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434243676] [2023-11-29 04:59:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434243676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042698620] [2023-11-29 04:59:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:59:28,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:28,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:28,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:59:28,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 04:59:28,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:28,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 04:59:28,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:28,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 04:59:28,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:59:28,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:59:28,520 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 04:59:28,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 04:59:28,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 04:59:28,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 04:59:28,752 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-11-29 04:59:28,752 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 20 treesize of output 22 [2023-11-29 04:59:28,894 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-29 04:59:28,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2023-11-29 04:59:28,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2023-11-29 04:59:29,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 80 [2023-11-29 04:59:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:59:29,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:30,146 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 136 treesize of output 100 [2023-11-29 04:59:30,149 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 104 treesize of output 68 [2023-11-29 04:59:34,334 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (let ((.cse0 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)) (= (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0)))) is different from false [2023-11-29 04:59:39,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:59:39,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1922 treesize of output 1794 [2023-11-29 04:59:39,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:59:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:59:39,562 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 1046 treesize of output 982 [2023-11-29 04:59:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:59:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2023-11-29 04:59:40,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042698620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:40,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:40,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2023-11-29 04:59:40,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792017250] [2023-11-29 04:59:40,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:40,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:59:40,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:40,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:59:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1030, Unknown=2, NotChecked=64, Total=1190 [2023-11-29 04:59:40,404 INFO L87 Difference]: Start difference. First operand 195 states and 255 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:00:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:18,131 INFO L93 Difference]: Finished difference Result 261 states and 337 transitions. [2023-11-29 05:00:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:00:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-11-29 05:00:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:18,134 INFO L225 Difference]: With dead ends: 261 [2023-11-29 05:00:18,134 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 05:00:18,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=136, Invalid=1348, Unknown=2, NotChecked=74, Total=1560 [2023-11-29 05:00:18,136 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 71 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:18,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1018 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 684 Invalid, 0 Unknown, 59 Unchecked, 1.2s Time] [2023-11-29 05:00:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 05:00:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2023-11-29 05:00:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 201 states have (on average 1.2587064676616915) internal successors, (253), 208 states have internal predecessors, (253), 18 states have call successors, (18), 5 states have call predecessors, (18), 11 states have return successors, (33), 17 states have call predecessors, (33), 18 states have call successors, (33) [2023-11-29 05:00:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2023-11-29 05:00:18,168 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 45 [2023-11-29 05:00:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:18,168 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2023-11-29 05:00:18,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:00:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2023-11-29 05:00:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 05:00:18,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:18,170 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:18,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 05:00:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:00:18,372 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:18,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1285973098, now seen corresponding path program 6 times [2023-11-29 05:00:18,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:18,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030104631] [2023-11-29 05:00:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:18,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:18,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:18,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 05:00:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:00:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030104631] [2023-11-29 05:00:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030104631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364534038] [2023-11-29 05:00:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:00:18,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:18,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:18,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:00:18,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 05:00:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:00:18,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:00:18,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:00:18,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:00:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364534038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:00:19,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:00:19,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2023-11-29 05:00:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140507285] [2023-11-29 05:00:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:00:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:00:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:00:19,233 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 20 states, 17 states have (on average 4.0) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:19,684 INFO L93 Difference]: Finished difference Result 304 states and 416 transitions. [2023-11-29 05:00:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:00:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.0) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-11-29 05:00:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:19,687 INFO L225 Difference]: With dead ends: 304 [2023-11-29 05:00:19,687 INFO L226 Difference]: Without dead ends: 247 [2023-11-29 05:00:19,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:00:19,688 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:19,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 376 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:00:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-29 05:00:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2023-11-29 05:00:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 193 states have (on average 1.2590673575129534) internal successors, (243), 200 states have internal predecessors, (243), 17 states have call successors, (17), 5 states have call predecessors, (17), 11 states have return successors, (31), 16 states have call predecessors, (31), 17 states have call successors, (31) [2023-11-29 05:00:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 291 transitions. [2023-11-29 05:00:19,718 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 291 transitions. Word has length 47 [2023-11-29 05:00:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:19,718 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 291 transitions. [2023-11-29 05:00:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.0) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 291 transitions. [2023-11-29 05:00:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:00:19,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:19,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:19,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:00:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:00:19,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:19,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1353750673, now seen corresponding path program 1 times [2023-11-29 05:00:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750544938] [2023-11-29 05:00:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:00:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 05:00:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:00:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750544938] [2023-11-29 05:00:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750544938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234321755] [2023-11-29 05:00:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:20,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:00:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:00:20,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:00:20,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:00:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234321755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:00:20,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:00:20,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-29 05:00:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380024014] [2023-11-29 05:00:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:00:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:00:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:00:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:00:20,318 INFO L87 Difference]: Start difference. First operand 222 states and 291 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:00:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:20,396 INFO L93 Difference]: Finished difference Result 307 states and 398 transitions. [2023-11-29 05:00:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:00:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-11-29 05:00:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:20,398 INFO L225 Difference]: With dead ends: 307 [2023-11-29 05:00:20,398 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 05:00:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:00:20,399 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:20,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:00:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 05:00:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2023-11-29 05:00:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 147 states have internal predecessors, (174), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-29 05:00:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2023-11-29 05:00:20,429 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 50 [2023-11-29 05:00:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:20,429 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2023-11-29 05:00:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:00:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2023-11-29 05:00:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 05:00:20,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:20,431 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:20,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:00:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:00:20,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:20,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -538086489, now seen corresponding path program 7 times [2023-11-29 05:00:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876328932] [2023-11-29 05:00:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 05:00:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:00:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876328932] [2023-11-29 05:00:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876328932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688290534] [2023-11-29 05:00:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:00:20,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:20,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:20,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:00:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:21,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:00:21,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:00:21,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:00:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688290534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:00:21,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:00:21,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 05:00:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182874876] [2023-11-29 05:00:21,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:00:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:00:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:00:21,367 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 17 states, 14 states have (on average 4.5) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:21,799 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2023-11-29 05:00:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:00:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.5) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-29 05:00:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:21,801 INFO L225 Difference]: With dead ends: 241 [2023-11-29 05:00:21,802 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 05:00:21,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:00:21,803 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:21,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 356 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:00:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 05:00:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 153. [2023-11-29 05:00:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 138 states have internal predecessors, (163), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-29 05:00:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2023-11-29 05:00:21,833 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 49 [2023-11-29 05:00:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:21,833 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2023-11-29 05:00:21,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.5) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2023-11-29 05:00:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 05:00:21,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:21,835 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:21,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:00:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:00:22,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1012795119, now seen corresponding path program 8 times [2023-11-29 05:00:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695084172] [2023-11-29 05:00:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:23,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:00:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:00:23,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695084172] [2023-11-29 05:00:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695084172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518298841] [2023-11-29 05:00:23,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:00:23,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:23,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:23,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:00:23,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:00:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:00:23,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 05:00:23,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:23,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:00:23,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:00:23,287 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:00:23,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:00:23,375 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 28 treesize of output 16 [2023-11-29 05:00:23,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:00:23,490 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-11-29 05:00:23,490 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 20 treesize of output 22 [2023-11-29 05:00:23,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 05:00:23,616 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-29 05:00:23,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 38 [2023-11-29 05:00:24,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 66 [2023-11-29 05:00:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:00:24,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-29 05:00:24,471 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-11-29 05:00:24,471 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2023-11-29 05:00:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:00:24,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:24,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 53 [2023-11-29 05:00:24,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2023-11-29 05:00:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:00:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:00:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518298841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:00:26,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:00:26,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 33 [2023-11-29 05:00:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702020273] [2023-11-29 05:00:26,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:00:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:00:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:00:26,441 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:00:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:28,415 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2023-11-29 05:00:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:00:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-29 05:00:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:28,417 INFO L225 Difference]: With dead ends: 172 [2023-11-29 05:00:28,417 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 05:00:28,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 05:00:28,419 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 47 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:28,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1060 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:00:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 05:00:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2023-11-29 05:00:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2238805970149254) internal successors, (164), 139 states have internal predecessors, (164), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-29 05:00:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 188 transitions. [2023-11-29 05:00:28,449 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 188 transitions. Word has length 51 [2023-11-29 05:00:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:28,449 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 188 transitions. [2023-11-29 05:00:28,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:00:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 188 transitions. [2023-11-29 05:00:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:00:28,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:28,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:28,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:00:28,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:00:28,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:28,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash 529136507, now seen corresponding path program 1 times [2023-11-29 05:00:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:28,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361626761] [2023-11-29 05:00:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:28,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:28,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:28,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:00:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:00:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 05:00:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361626761] [2023-11-29 05:00:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361626761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:00:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:00:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:00:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677645226] [2023-11-29 05:00:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:00:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:00:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:00:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:00:28,783 INFO L87 Difference]: Start difference. First operand 154 states and 188 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:00:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:28,921 INFO L93 Difference]: Finished difference Result 164 states and 198 transitions. [2023-11-29 05:00:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:00:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-11-29 05:00:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:28,923 INFO L225 Difference]: With dead ends: 164 [2023-11-29 05:00:28,923 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 05:00:28,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:00:28,924 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 138 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:00:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 05:00:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2023-11-29 05:00:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.217741935483871) internal successors, (151), 129 states have internal predecessors, (151), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-29 05:00:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2023-11-29 05:00:28,950 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 53 [2023-11-29 05:00:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:28,950 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2023-11-29 05:00:28,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:00:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2023-11-29 05:00:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 05:00:28,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:28,952 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:28,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:00:28,952 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:28,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1331310057, now seen corresponding path program 9 times [2023-11-29 05:00:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:28,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518197499] [2023-11-29 05:00:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:28,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:29,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:00:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 05:00:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518197499] [2023-11-29 05:00:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518197499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190030581] [2023-11-29 05:00:29,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:00:29,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:29,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:29,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:29,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:00:29,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:00:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:00:29,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:00:29,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:00:29,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 05:00:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190030581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:00:30,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:00:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 38 [2023-11-29 05:00:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293145914] [2023-11-29 05:00:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:00:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:00:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:00:30,330 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:31,413 INFO L93 Difference]: Finished difference Result 254 states and 325 transitions. [2023-11-29 05:00:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:00:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-29 05:00:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:31,415 INFO L225 Difference]: With dead ends: 254 [2023-11-29 05:00:31,415 INFO L226 Difference]: Without dead ends: 250 [2023-11-29 05:00:31,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 05:00:31,417 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 130 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:31,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1238 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:00:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-29 05:00:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 173. [2023-11-29 05:00:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 157 states have internal predecessors, (182), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-29 05:00:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2023-11-29 05:00:31,450 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 52 [2023-11-29 05:00:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:31,450 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2023-11-29 05:00:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:00:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2023-11-29 05:00:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 05:00:31,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:31,452 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:31,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 05:00:31,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:31,653 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:31,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1456128277, now seen corresponding path program 1 times [2023-11-29 05:00:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676723283] [2023-11-29 05:00:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:00:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:31,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:00:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 05:00:31,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676723283] [2023-11-29 05:00:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676723283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:00:31,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:00:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:00:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340840781] [2023-11-29 05:00:31,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:00:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:00:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:00:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:00:31,705 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:00:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:31,751 INFO L93 Difference]: Finished difference Result 201 states and 243 transitions. [2023-11-29 05:00:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:00:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-11-29 05:00:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:31,754 INFO L225 Difference]: With dead ends: 201 [2023-11-29 05:00:31,754 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 05:00:31,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:00:31,755 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:00:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 05:00:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2023-11-29 05:00:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 161 states have internal predecessors, (187), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-29 05:00:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2023-11-29 05:00:31,787 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 54 [2023-11-29 05:00:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:31,787 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2023-11-29 05:00:31,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:00:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2023-11-29 05:00:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 05:00:31,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:31,788 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 05:00:31,788 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:00:31,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash -776069907, now seen corresponding path program 1 times [2023-11-29 05:00:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071186223] [2023-11-29 05:00:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:31,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:32,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:00:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:32,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:00:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:32,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:00:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 05:00:32,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071186223] [2023-11-29 05:00:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071186223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736171909] [2023-11-29 05:00:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:32,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:32,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:00:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:32,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 05:00:32,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:32,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 05:00:32,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:00:32,917 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 43 treesize of output 20 [2023-11-29 05:00:32,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-11-29 05:00:32,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 05:00:32,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:00:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:00:32,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:33,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-11-29 05:00:37,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2023-11-29 05:00:37,102 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 66 treesize of output 50 [2023-11-29 05:00:37,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-29 05:00:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 05:00:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736171909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:00:37,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:00:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2023-11-29 05:00:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305991670] [2023-11-29 05:00:37,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:00:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:00:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-11-29 05:00:37,167 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:00:41,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:00:45,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:00:49,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:00:53,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:00:57,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:01:01,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:01:05,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:01:09,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:01:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:09,702 INFO L93 Difference]: Finished difference Result 230 states and 276 transitions. [2023-11-29 05:01:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:01:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2023-11-29 05:01:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:09,705 INFO L225 Difference]: With dead ends: 230 [2023-11-29 05:01:09,705 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 05:01:09,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=117, Invalid=584, Unknown=1, NotChecked=0, Total=702 [2023-11-29 05:01:09,706 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 101 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:09,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 482 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 8 Unknown, 0 Unchecked, 32.4s Time] [2023-11-29 05:01:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 05:01:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 200. [2023-11-29 05:01:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 182 states have internal predecessors, (215), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-29 05:01:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 243 transitions. [2023-11-29 05:01:09,737 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 243 transitions. Word has length 54 [2023-11-29 05:01:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:09,737 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 243 transitions. [2023-11-29 05:01:09,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:01:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 243 transitions. [2023-11-29 05:01:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:01:09,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:09,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:01:09,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:01:09,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:01:09,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:09,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1679628753, now seen corresponding path program 10 times [2023-11-29 05:01:09,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208855462] [2023-11-29 05:01:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:01:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:01:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:01:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208855462] [2023-11-29 05:01:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208855462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:01:12,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276952860] [2023-11-29 05:01:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:01:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:12,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:12,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:01:12,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:01:12,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:01:12,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 05:01:12,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:12,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:01:12,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:01:12,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:01:12,414 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:01:12,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:01:12,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:01:12,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 05:01:12,658 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-11-29 05:01:12,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-11-29 05:01:12,807 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-29 05:01:12,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 49 [2023-11-29 05:01:12,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2023-11-29 05:01:12,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:01:12,954 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-11-29 05:01:12,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2023-11-29 05:01:13,134 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2023-11-29 05:01:13,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 69 [2023-11-29 05:01:13,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:01:13,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:01:13,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2023-11-29 05:01:14,088 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 183 treesize of output 135 [2023-11-29 05:01:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:01:14,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:15,374 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 264 treesize of output 196 [2023-11-29 05:01:15,378 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 200 treesize of output 132 [2023-11-29 05:01:19,653 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| Int)) (or (= (let ((.cse0 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse3 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (select (select .cse0 .cse2) .cse3)))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| Int)) (or (= (let ((.cse7 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse4 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95| (store (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse6 (select (select .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select .cse4 (select (select .cse4 .cse5) .cse6)) (select (select .cse7 .cse5) .cse6)))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_95|) 0))))) is different from false [2023-11-29 05:01:51,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,320 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 5094 treesize of output 4838 [2023-11-29 05:01:51,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,328 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,588 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:51,589 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:52,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:01:52,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 154395 treesize of output 135156 [2023-11-29 05:01:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:52,596 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:01:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 8 not checked. [2023-11-29 05:01:58,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276952860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:01:58,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:01:58,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 44 [2023-11-29 05:01:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199633986] [2023-11-29 05:01:58,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 05:01:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 05:01:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1680, Unknown=8, NotChecked=82, Total=1892 [2023-11-29 05:01:58,881 INFO L87 Difference]: Start difference. First operand 200 states and 243 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:02:45,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:02:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:45,581 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2023-11-29 05:02:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:02:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2023-11-29 05:02:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:45,583 INFO L225 Difference]: With dead ends: 264 [2023-11-29 05:02:45,583 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 05:02:45,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=173, Invalid=2175, Unknown=8, NotChecked=94, Total=2450 [2023-11-29 05:02:45,585 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 41 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:45,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1522 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1163 Invalid, 0 Unknown, 66 Unchecked, 5.2s Time] [2023-11-29 05:02:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 05:02:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2023-11-29 05:02:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 206 states have (on average 1.2135922330097086) internal successors, (250), 213 states have internal predecessors, (250), 13 states have call successors, (13), 7 states have call predecessors, (13), 14 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2023-11-29 05:02:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 286 transitions. [2023-11-29 05:02:45,638 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 286 transitions. Word has length 53 [2023-11-29 05:02:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:45,638 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 286 transitions. [2023-11-29 05:02:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:02:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 286 transitions. [2023-11-29 05:02:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:02:45,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:45,639 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:45,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:02:45,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:45,840 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:45,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1712204219, now seen corresponding path program 2 times [2023-11-29 05:02:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:45,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379078546] [2023-11-29 05:02:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:02:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:46,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:02:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:46,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:02:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 05:02:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:46,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379078546] [2023-11-29 05:02:46,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379078546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036380815] [2023-11-29 05:02:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:02:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:46,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:46,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:02:46,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:02:46,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:46,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:02:46,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:46,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:02:46,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:02:47,334 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 05:02:47,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 05:02:47,579 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 28 treesize of output 27 [2023-11-29 05:02:47,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 05:02:47,703 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 59 treesize of output 32 [2023-11-29 05:02:47,715 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 23 treesize of output 3 [2023-11-29 05:02:47,826 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 63 treesize of output 43 [2023-11-29 05:02:47,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2023-11-29 05:02:47,903 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 7 treesize of output 3 [2023-11-29 05:02:47,989 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:02:47,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-11-29 05:02:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:02:47,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:48,083 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 198 treesize of output 170 [2023-11-29 05:02:48,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036380815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:48,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2023-11-29 05:02:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763539845] [2023-11-29 05:02:48,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:02:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:02:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:02:48,933 INFO L87 Difference]: Start difference. First operand 234 states and 286 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:02:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:50,230 INFO L93 Difference]: Finished difference Result 279 states and 338 transitions. [2023-11-29 05:02:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:02:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2023-11-29 05:02:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:50,232 INFO L225 Difference]: With dead ends: 279 [2023-11-29 05:02:50,232 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 05:02:50,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:02:50,234 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:50,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 595 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:02:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 05:02:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 244. [2023-11-29 05:02:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 216 states have (on average 1.212962962962963) internal successors, (262), 222 states have internal predecessors, (262), 13 states have call successors, (13), 7 states have call predecessors, (13), 14 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2023-11-29 05:02:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 298 transitions. [2023-11-29 05:02:50,276 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 298 transitions. Word has length 55 [2023-11-29 05:02:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:50,276 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 298 transitions. [2023-11-29 05:02:50,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:02:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 298 transitions. [2023-11-29 05:02:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 05:02:50,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:50,278 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:50,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:02:50,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:50,478 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:50,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1539290797, now seen corresponding path program 3 times [2023-11-29 05:02:50,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:50,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240571257] [2023-11-29 05:02:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:50,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:02:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:50,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:02:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:51,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:02:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:02:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240571257] [2023-11-29 05:02:51,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240571257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498384356] [2023-11-29 05:02:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:02:51,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:51,025 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:51,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:02:51,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:02:51,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:51,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:02:51,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:02:51,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:02:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498384356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:53,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:02:53,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 54 [2023-11-29 05:02:53,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878536918] [2023-11-29 05:02:53,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 05:02:53,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 05:02:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2643, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 05:02:53,343 INFO L87 Difference]: Start difference. First operand 244 states and 298 transitions. Second operand has 54 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 50 states have internal predecessors, (113), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 05:02:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:58,517 INFO L93 Difference]: Finished difference Result 990 states and 1339 transitions. [2023-11-29 05:02:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 05:02:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 50 states have internal predecessors, (113), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 56 [2023-11-29 05:02:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:58,522 INFO L225 Difference]: With dead ends: 990 [2023-11-29 05:02:58,522 INFO L226 Difference]: Without dead ends: 747 [2023-11-29 05:02:58,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3453 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1289, Invalid=11593, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 05:02:58,528 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 485 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:58,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1032 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 05:02:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-11-29 05:02:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 454. [2023-11-29 05:02:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 403 states have (on average 1.215880893300248) internal successors, (490), 414 states have internal predecessors, (490), 23 states have call successors, (23), 10 states have call predecessors, (23), 27 states have return successors, (88), 29 states have call predecessors, (88), 23 states have call successors, (88) [2023-11-29 05:02:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 601 transitions. [2023-11-29 05:02:58,616 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 601 transitions. Word has length 56 [2023-11-29 05:02:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:58,617 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 601 transitions. [2023-11-29 05:02:58,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 50 states have internal predecessors, (113), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 05:02:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 601 transitions. [2023-11-29 05:02:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 05:02:58,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:58,619 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:58,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:02:58,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:02:58,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:58,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2066925968, now seen corresponding path program 1 times [2023-11-29 05:02:58,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:58,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560898096] [2023-11-29 05:02:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:58,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:02:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:58,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:02:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:02:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:02:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560898096] [2023-11-29 05:02:58,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560898096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:58,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:58,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:02:58,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053979680] [2023-11-29 05:02:58,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:58,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:02:58,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:02:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:58,962 INFO L87 Difference]: Start difference. First operand 454 states and 601 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:02:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:59,169 INFO L93 Difference]: Finished difference Result 675 states and 895 transitions. [2023-11-29 05:02:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:02:59,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2023-11-29 05:02:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:59,173 INFO L225 Difference]: With dead ends: 675 [2023-11-29 05:02:59,173 INFO L226 Difference]: Without dead ends: 505 [2023-11-29 05:02:59,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:02:59,174 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:59,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 165 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:02:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-11-29 05:02:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2023-11-29 05:02:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 451 states have (on average 1.1929046563192904) internal successors, (538), 456 states have internal predecessors, (538), 23 states have call successors, (23), 10 states have call predecessors, (23), 30 states have return successors, (95), 38 states have call predecessors, (95), 23 states have call successors, (95) [2023-11-29 05:02:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 656 transitions. [2023-11-29 05:02:59,300 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 656 transitions. Word has length 56 [2023-11-29 05:02:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 656 transitions. [2023-11-29 05:02:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:02:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 656 transitions. [2023-11-29 05:02:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:02:59,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:59,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:59,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 05:02:59,303 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:59,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1344561753, now seen corresponding path program 11 times [2023-11-29 05:02:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:59,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101040167] [2023-11-29 05:02:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:59,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:02:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:59,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:02:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 05:02:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101040167] [2023-11-29 05:02:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101040167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59368359] [2023-11-29 05:02:59,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:02:59,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:59,593 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:59,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:02:59,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:02:59,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:02:59,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:02:59,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 05:02:59,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 05:03:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59368359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:00,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:00,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 05:03:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482460595] [2023-11-29 05:03:00,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:03:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:03:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:03:00,307 INFO L87 Difference]: Start difference. First operand 505 states and 656 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:01,462 INFO L93 Difference]: Finished difference Result 964 states and 1308 transitions. [2023-11-29 05:03:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:03:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-29 05:03:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:01,467 INFO L225 Difference]: With dead ends: 964 [2023-11-29 05:03:01,467 INFO L226 Difference]: Without dead ends: 594 [2023-11-29 05:03:01,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:03:01,469 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 81 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:01,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 242 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:03:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-29 05:03:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 504. [2023-11-29 05:03:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 450 states have (on average 1.1888888888888889) internal successors, (535), 455 states have internal predecessors, (535), 23 states have call successors, (23), 10 states have call predecessors, (23), 30 states have return successors, (95), 38 states have call predecessors, (95), 23 states have call successors, (95) [2023-11-29 05:03:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 653 transitions. [2023-11-29 05:03:01,594 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 653 transitions. Word has length 55 [2023-11-29 05:03:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:01,595 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 653 transitions. [2023-11-29 05:03:01,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 653 transitions. [2023-11-29 05:03:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:03:01,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:01,597 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:01,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:01,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:03:01,798 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:01,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1096415259, now seen corresponding path program 2 times [2023-11-29 05:03:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367271728] [2023-11-29 05:03:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:01,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:03:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:02,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:03:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:03:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:02,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367271728] [2023-11-29 05:03:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367271728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713003791] [2023-11-29 05:03:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:03:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:02,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:03:02,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:03:02,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:02,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:03:02,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:03:02,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:03:02,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713003791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:02,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:02,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2023-11-29 05:03:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850819056] [2023-11-29 05:03:02,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:03:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:03:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:03:02,961 INFO L87 Difference]: Start difference. First operand 504 states and 653 transitions. Second operand has 24 states, 21 states have (on average 3.857142857142857) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:03,719 INFO L93 Difference]: Finished difference Result 857 states and 1148 transitions. [2023-11-29 05:03:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:03:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.857142857142857) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-29 05:03:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:03,723 INFO L225 Difference]: With dead ends: 857 [2023-11-29 05:03:03,723 INFO L226 Difference]: Without dead ends: 554 [2023-11-29 05:03:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:03:03,725 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 38 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 582 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:03:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-11-29 05:03:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 458. [2023-11-29 05:03:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 414 states have (on average 1.1908212560386473) internal successors, (493), 415 states have internal predecessors, (493), 18 states have call successors, (18), 8 states have call predecessors, (18), 25 states have return successors, (73), 34 states have call predecessors, (73), 18 states have call successors, (73) [2023-11-29 05:03:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 584 transitions. [2023-11-29 05:03:03,831 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 584 transitions. Word has length 55 [2023-11-29 05:03:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:03,831 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 584 transitions. [2023-11-29 05:03:03,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.857142857142857) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 584 transitions. [2023-11-29 05:03:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 05:03:03,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:03,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:03,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:03:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:03:04,034 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:04,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 473942011, now seen corresponding path program 4 times [2023-11-29 05:03:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162214018] [2023-11-29 05:03:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:03:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:03:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:03:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 05:03:05,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162214018] [2023-11-29 05:03:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162214018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057732231] [2023-11-29 05:03:05,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:03:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:05,808 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:05,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:03:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:03:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:05,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 05:03:05,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:06,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:03:06,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:03:06,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:03:06,241 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:03:06,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:03:06,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 05:03:06,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:03:07,563 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 05:03:07,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 05:03:07,999 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-29 05:03:07,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 55 [2023-11-29 05:03:08,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2023-11-29 05:03:08,193 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 [2023-11-29 05:03:08,199 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 104 treesize of output 61 [2023-11-29 05:03:08,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 80 [2023-11-29 05:03:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:03:08,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057732231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:26,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:26,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-11-29 05:03:26,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148096755] [2023-11-29 05:03:26,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:26,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 05:03:26,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 05:03:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1442, Unknown=3, NotChecked=0, Total=1560 [2023-11-29 05:03:26,200 INFO L87 Difference]: Start difference. First operand 458 states and 584 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:03:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:28,468 INFO L93 Difference]: Finished difference Result 501 states and 637 transitions. [2023-11-29 05:03:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:03:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2023-11-29 05:03:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:28,472 INFO L225 Difference]: With dead ends: 501 [2023-11-29 05:03:28,472 INFO L226 Difference]: Without dead ends: 491 [2023-11-29 05:03:28,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=192, Invalid=2061, Unknown=3, NotChecked=0, Total=2256 [2023-11-29 05:03:28,474 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 31 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:28,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 967 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:03:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-29 05:03:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 472. [2023-11-29 05:03:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 428 states have (on average 1.1869158878504673) internal successors, (508), 427 states have internal predecessors, (508), 18 states have call successors, (18), 8 states have call predecessors, (18), 25 states have return successors, (73), 36 states have call predecessors, (73), 18 states have call successors, (73) [2023-11-29 05:03:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 599 transitions. [2023-11-29 05:03:28,624 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 599 transitions. Word has length 57 [2023-11-29 05:03:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:28,624 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 599 transitions. [2023-11-29 05:03:28,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:03:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 599 transitions. [2023-11-29 05:03:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 05:03:28,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:28,627 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:28,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:03:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:03:28,832 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:28,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash 256529720, now seen corresponding path program 12 times [2023-11-29 05:03:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906563976] [2023-11-29 05:03:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:29,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:03:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 05:03:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:03:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906563976] [2023-11-29 05:03:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906563976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251521996] [2023-11-29 05:03:29,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:03:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:29,100 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:29,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:03:29,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 05:03:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:29,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:03:29,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:03:29,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:03:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251521996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:29,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-11-29 05:03:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329612503] [2023-11-29 05:03:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:29,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:03:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:03:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:03:29,687 INFO L87 Difference]: Start difference. First operand 472 states and 599 transitions. Second operand has 21 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:30,800 INFO L93 Difference]: Finished difference Result 830 states and 1092 transitions. [2023-11-29 05:03:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:03:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-29 05:03:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:30,805 INFO L225 Difference]: With dead ends: 830 [2023-11-29 05:03:30,805 INFO L226 Difference]: Without dead ends: 527 [2023-11-29 05:03:30,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:03:30,808 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:30,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 475 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:03:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-29 05:03:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 448. [2023-11-29 05:03:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 405 states have (on average 1.1925925925925926) internal successors, (483), 404 states have internal predecessors, (483), 17 states have call successors, (17), 8 states have call predecessors, (17), 25 states have return successors, (68), 35 states have call predecessors, (68), 17 states have call successors, (68) [2023-11-29 05:03:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 568 transitions. [2023-11-29 05:03:30,923 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 568 transitions. Word has length 57 [2023-11-29 05:03:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:30,923 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 568 transitions. [2023-11-29 05:03:30,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:03:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 568 transitions. [2023-11-29 05:03:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:03:30,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:30,925 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:30,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:03:31,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:31,125 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:31,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash 569838996, now seen corresponding path program 2 times [2023-11-29 05:03:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:31,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360557190] [2023-11-29 05:03:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:31,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:03:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:31,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:03:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:31,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:03:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 05:03:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360557190] [2023-11-29 05:03:31,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360557190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115066978] [2023-11-29 05:03:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:03:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:31,399 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:31,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:03:31,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:03:31,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:31,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:03:31,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 05:03:31,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 05:03:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115066978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:32,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:32,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2023-11-29 05:03:32,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627667832] [2023-11-29 05:03:32,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:03:32,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:03:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:03:32,247 INFO L87 Difference]: Start difference. First operand 448 states and 568 transitions. Second operand has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 23 states have internal predecessors, (84), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 05:03:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:34,477 INFO L93 Difference]: Finished difference Result 875 states and 1137 transitions. [2023-11-29 05:03:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:03:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 23 states have internal predecessors, (84), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2023-11-29 05:03:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:34,481 INFO L225 Difference]: With dead ends: 875 [2023-11-29 05:03:34,481 INFO L226 Difference]: Without dead ends: 767 [2023-11-29 05:03:34,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:03:34,483 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 133 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:34,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 766 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:03:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-11-29 05:03:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 482. [2023-11-29 05:03:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 440 states have (on average 1.2159090909090908) internal successors, (535), 438 states have internal predecessors, (535), 17 states have call successors, (17), 8 states have call predecessors, (17), 24 states have return successors, (67), 35 states have call predecessors, (67), 17 states have call successors, (67) [2023-11-29 05:03:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 619 transitions. [2023-11-29 05:03:34,633 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 619 transitions. Word has length 59 [2023-11-29 05:03:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:34,634 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 619 transitions. [2023-11-29 05:03:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 23 states have internal predecessors, (84), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 05:03:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 619 transitions. [2023-11-29 05:03:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:03:34,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:34,636 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:34,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:03:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:34,840 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:34,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1672599192, now seen corresponding path program 1 times [2023-11-29 05:03:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65882814] [2023-11-29 05:03:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:03:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:03:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:03:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 05:03:35,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:35,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65882814] [2023-11-29 05:03:35,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65882814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914492200] [2023-11-29 05:03:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:35,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:35,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:35,354 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:35,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:03:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:35,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:03:35,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:35,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:03:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 05:03:36,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:36,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-29 05:03:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 05:03:36,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914492200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:36,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:03:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 26 [2023-11-29 05:03:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358858016] [2023-11-29 05:03:36,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:03:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:03:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:03:36,179 INFO L87 Difference]: Start difference. First operand 482 states and 619 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 05:03:40,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:03:44,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:03:48,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:03:52,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:03:56,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:01,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:05,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:09,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:13,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:17,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:21,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:25,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:25,969 INFO L93 Difference]: Finished difference Result 758 states and 976 transitions. [2023-11-29 05:04:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:04:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 59 [2023-11-29 05:04:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:25,973 INFO L225 Difference]: With dead ends: 758 [2023-11-29 05:04:25,973 INFO L226 Difference]: Without dead ends: 628 [2023-11-29 05:04:25,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:04:25,974 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 168 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 6 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:25,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 904 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 749 Invalid, 12 Unknown, 0 Unchecked, 48.8s Time] [2023-11-29 05:04:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-29 05:04:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 482. [2023-11-29 05:04:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 440 states have (on average 1.2068181818181818) internal successors, (531), 438 states have internal predecessors, (531), 17 states have call successors, (17), 8 states have call predecessors, (17), 24 states have return successors, (67), 35 states have call predecessors, (67), 17 states have call successors, (67) [2023-11-29 05:04:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 615 transitions. [2023-11-29 05:04:26,069 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 615 transitions. Word has length 59 [2023-11-29 05:04:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:26,069 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 615 transitions. [2023-11-29 05:04:26,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 05:04:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 615 transitions. [2023-11-29 05:04:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 05:04:26,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:26,071 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:26,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:04:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:26,272 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:26,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash 704561970, now seen corresponding path program 3 times [2023-11-29 05:04:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45249544] [2023-11-29 05:04:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:26,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:04:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:04:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:26,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:04:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 05:04:26,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45249544] [2023-11-29 05:04:26,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45249544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718849361] [2023-11-29 05:04:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:04:26,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:26,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:26,888 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:26,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:04:27,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 05:04:27,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:27,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 05:04:27,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:27,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:04:27,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:04:27,806 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 05:04:27,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 05:04:28,178 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-11-29 05:04:28,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 05:04:28,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 23 [2023-11-29 05:04:28,404 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 51 treesize of output 31 [2023-11-29 05:04:28,488 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 7 treesize of output 3 [2023-11-29 05:04:28,577 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:04:28,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-11-29 05:04:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 05:04:28,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:28,613 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 118 treesize of output 106 [2023-11-29 05:04:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718849361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:29,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2023-11-29 05:04:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863600892] [2023-11-29 05:04:29,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:29,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:04:29,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:04:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:04:29,493 INFO L87 Difference]: Start difference. First operand 482 states and 615 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:04:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:31,144 INFO L93 Difference]: Finished difference Result 624 states and 798 transitions. [2023-11-29 05:04:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:04:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 60 [2023-11-29 05:04:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:31,148 INFO L225 Difference]: With dead ends: 624 [2023-11-29 05:04:31,148 INFO L226 Difference]: Without dead ends: 620 [2023-11-29 05:04:31,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:04:31,149 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 83 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:31,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 784 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:04:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-29 05:04:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 506. [2023-11-29 05:04:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 464 states have (on average 1.2133620689655173) internal successors, (563), 462 states have internal predecessors, (563), 17 states have call successors, (17), 8 states have call predecessors, (17), 24 states have return successors, (67), 35 states have call predecessors, (67), 17 states have call successors, (67) [2023-11-29 05:04:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 647 transitions. [2023-11-29 05:04:31,249 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 647 transitions. Word has length 60 [2023-11-29 05:04:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:31,250 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 647 transitions. [2023-11-29 05:04:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:04:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 647 transitions. [2023-11-29 05:04:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 05:04:31,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:31,251 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:31,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:04:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:31,452 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:31,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 217361566, now seen corresponding path program 3 times [2023-11-29 05:04:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:31,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628906654] [2023-11-29 05:04:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:04:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 05:04:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 05:04:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:33,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628906654] [2023-11-29 05:04:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628906654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:04:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324043284] [2023-11-29 05:04:33,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:04:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:33,212 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:33,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:04:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:04:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:04:33,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 05:04:33,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:33,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:04:33,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:04:33,520 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:04:33,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:04:33,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:04:33,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-29 05:04:33,787 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-11-29 05:04:33,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-11-29 05:04:33,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 05:04:33,974 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-29 05:04:33,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 43 [2023-11-29 05:04:34,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:04:34,184 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-11-29 05:04:34,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2023-11-29 05:04:34,373 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2023-11-29 05:04:34,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 63 [2023-11-29 05:04:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:04:34,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2023-11-29 05:04:35,215 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 161 treesize of output 117 [2023-11-29 05:04:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:04:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:04:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:04:35,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-11-29 05:04:35,823 INFO L349 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2023-11-29 05:04:35,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 41 [2023-11-29 05:04:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 05:04:35,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:36,116 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 137 treesize of output 101 [2023-11-29 05:04:36,119 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 105 treesize of output 69 [2023-11-29 05:04:49,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:04:49,915 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 5110 treesize of output 4982 [2023-11-29 05:05:04,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:05:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:05:04,532 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:05:04,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:05:04,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 646161 treesize of output 637986 [2023-11-29 05:05:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 48 refuted. 2 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 05:05:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324043284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:05:13,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:05:13,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 42 [2023-11-29 05:05:13,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794291125] [2023-11-29 05:05:13,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:05:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:05:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:05:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1603, Unknown=7, NotChecked=0, Total=1722 [2023-11-29 05:05:13,054 INFO L87 Difference]: Start difference. First operand 506 states and 647 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:05:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:18,684 INFO L93 Difference]: Finished difference Result 601 states and 754 transitions. [2023-11-29 05:05:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:05:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-11-29 05:05:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:18,687 INFO L225 Difference]: With dead ends: 601 [2023-11-29 05:05:18,687 INFO L226 Difference]: Without dead ends: 597 [2023-11-29 05:05:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=303, Invalid=2770, Unknown=7, NotChecked=0, Total=3080 [2023-11-29 05:05:18,688 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 33 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:18,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1449 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 05:05:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-29 05:05:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 508. [2023-11-29 05:05:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 466 states have (on average 1.2124463519313304) internal successors, (565), 464 states have internal predecessors, (565), 17 states have call successors, (17), 8 states have call predecessors, (17), 24 states have return successors, (67), 35 states have call predecessors, (67), 17 states have call successors, (67) [2023-11-29 05:05:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 649 transitions. [2023-11-29 05:05:18,810 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 649 transitions. Word has length 59 [2023-11-29 05:05:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:18,811 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 649 transitions. [2023-11-29 05:05:18,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:05:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 649 transitions. [2023-11-29 05:05:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 05:05:18,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:18,812 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:18,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:05:19,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:19,013 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:19,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1595851899, now seen corresponding path program 4 times [2023-11-29 05:05:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787613024] [2023-11-29 05:05:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:05:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:05:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:05:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:05:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787613024] [2023-11-29 05:05:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787613024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590142988] [2023-11-29 05:05:19,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:05:19,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:19,196 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:19,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:05:19,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:05:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:05:19,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:05:19,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:05:19,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:05:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:05:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590142988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:05:19,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:05:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-29 05:05:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163625134] [2023-11-29 05:05:19,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:05:19,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:05:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:05:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:05:19,661 INFO L87 Difference]: Start difference. First operand 508 states and 649 transitions. Second operand has 15 states, 12 states have (on average 5.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 05:05:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:20,059 INFO L93 Difference]: Finished difference Result 840 states and 1084 transitions. [2023-11-29 05:05:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:05:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 5.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2023-11-29 05:05:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:20,062 INFO L225 Difference]: With dead ends: 840 [2023-11-29 05:05:20,062 INFO L226 Difference]: Without dead ends: 596 [2023-11-29 05:05:20,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:05:20,063 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:20,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:05:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-29 05:05:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 555. [2023-11-29 05:05:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 509 states have (on average 1.1925343811394893) internal successors, (607), 504 states have internal predecessors, (607), 17 states have call successors, (17), 8 states have call predecessors, (17), 28 states have return successors, (81), 42 states have call predecessors, (81), 17 states have call successors, (81) [2023-11-29 05:05:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 705 transitions. [2023-11-29 05:05:20,259 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 705 transitions. Word has length 61 [2023-11-29 05:05:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:20,259 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 705 transitions. [2023-11-29 05:05:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 5.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 05:05:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 705 transitions. [2023-11-29 05:05:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 05:05:20,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:20,261 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:20,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:05:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 05:05:20,462 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1851158486, now seen corresponding path program 4 times [2023-11-29 05:05:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075673794] [2023-11-29 05:05:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:05:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 05:05:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 05:05:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075673794] [2023-11-29 05:05:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075673794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867859421] [2023-11-29 05:05:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:05:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:21,063 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:21,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:05:21,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:05:21,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:05:21,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 05:05:21,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 05:05:21,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:05:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 05:05:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867859421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:05:22,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:05:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 43 [2023-11-29 05:05:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256501865] [2023-11-29 05:05:22,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:05:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:05:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:05:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:05:22,645 INFO L87 Difference]: Start difference. First operand 555 states and 705 transitions. Second operand has 43 states, 39 states have (on average 2.128205128205128) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:05:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:24,903 INFO L93 Difference]: Finished difference Result 943 states and 1248 transitions. [2023-11-29 05:05:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:05:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 2.128205128205128) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2023-11-29 05:05:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:24,908 INFO L225 Difference]: With dead ends: 943 [2023-11-29 05:05:24,909 INFO L226 Difference]: Without dead ends: 939 [2023-11-29 05:05:24,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:05:24,910 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 150 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:24,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1533 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:05:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-11-29 05:05:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 556. [2023-11-29 05:05:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 510 states have (on average 1.192156862745098) internal successors, (608), 505 states have internal predecessors, (608), 17 states have call successors, (17), 8 states have call predecessors, (17), 28 states have return successors, (81), 42 states have call predecessors, (81), 17 states have call successors, (81) [2023-11-29 05:05:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 706 transitions. [2023-11-29 05:05:25,040 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 706 transitions. Word has length 60 [2023-11-29 05:05:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:25,040 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 706 transitions. [2023-11-29 05:05:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 2.128205128205128) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:05:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 706 transitions. [2023-11-29 05:05:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 05:05:25,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:25,041 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:05:25,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:05:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 05:05:25,242 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:25,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1502617678, now seen corresponding path program 5 times [2023-11-29 05:05:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77917716] [2023-11-29 05:05:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:05:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:26,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:05:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:26,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:05:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 05:05:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77917716] [2023-11-29 05:05:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77917716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462674159] [2023-11-29 05:05:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:05:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:27,002 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:27,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e11fb16c-6f09-401f-bddd-a1215f3f86cd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:05:27,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:05:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:05:27,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 05:05:27,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:27,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:05:27,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:05:27,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:05:27,293 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:05:27,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:05:27,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 05:05:27,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:05:28,765 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 05:05:28,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 05:05:29,412 INFO L349 Elim1Store]: treesize reduction 108, result has 15.0 percent of original size [2023-11-29 05:05:29,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 62 [2023-11-29 05:05:29,451 INFO L349 Elim1Store]: treesize reduction 81, result has 12.0 percent of original size [2023-11-29 05:05:29,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2023-11-29 05:05:29,772 INFO L349 Elim1Store]: treesize reduction 196, result has 40.6 percent of original size [2023-11-29 05:05:29,772 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 8 case distinctions, treesize of input 121 treesize of output 170 [2023-11-29 05:05:29,961 INFO L349 Elim1Store]: treesize reduction 156, result has 46.2 percent of original size [2023-11-29 05:05:29,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 143 [2023-11-29 05:05:53,873 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 1899 treesize of output 1519 [2023-11-29 05:05:58,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:05:58,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 1523 treesize of output 3439