./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.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_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/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_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/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_1607c554-5d45-480d-8691-e1fee7dd376b/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 ab074362043e1077b7e07850dc7266ebb0aa3522dd4cb68e5a4e8ce3df62fc46 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:39:35,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:39:35,814 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:39:35,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:39:35,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:39:35,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:39:35,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:39:35,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:39:35,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:39:35,854 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:39:35,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:39:35,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:39:35,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:39:35,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:39:35,857 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:39:35,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:39:35,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:39:35,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:39:35,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:39:35,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:39:35,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:39:35,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:39:35,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:39:35,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:39:35,862 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:39:35,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:39:35,863 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:39:35,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:39:35,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:39:35,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:39:35,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:39:35,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:39:35,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:39:35,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:39:35,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:39:35,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:39:35,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:39:35,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:39:35,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:39:35,868 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:39:35,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:39:35,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:39:35,868 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_1607c554-5d45-480d-8691-e1fee7dd376b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab074362043e1077b7e07850dc7266ebb0aa3522dd4cb68e5a4e8ce3df62fc46 [2023-11-29 02:39:36,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:39:36,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:39:36,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:39:36,123 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:39:36,123 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:39:36,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.i [2023-11-29 02:39:38,823 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:39:39,154 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:39:39,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.i [2023-11-29 02:39:39,181 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/data/018be9a30/b0709a72923043c69d198f3694e3d2d0/FLAGe0aac0192 [2023-11-29 02:39:39,194 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/data/018be9a30/b0709a72923043c69d198f3694e3d2d0 [2023-11-29 02:39:39,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:39:39,197 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:39:39,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:39:39,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:39:39,204 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:39:39,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:39:39" (1/1) ... [2023-11-29 02:39:39,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1691c8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:39, skipping insertion in model container [2023-11-29 02:39:39,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:39:39" (1/1) ... [2023-11-29 02:39:39,317 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:39:39,957 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_1607c554-5d45-480d-8691-e1fee7dd376b/sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.i[63709,63722] [2023-11-29 02:39:40,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:39:40,282 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:39:40,338 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_1607c554-5d45-480d-8691-e1fee7dd376b/sv-benchmarks/c/neural-networks/cartpole_59_safe.c-amalgamation.i[63709,63722] [2023-11-29 02:39:40,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:39:40,728 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:39:40,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40 WrapperNode [2023-11-29 02:39:40,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:39:40,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:39:40,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:39:40,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:39:40,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:40,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,006 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-29 02:39:41,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:39:41,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:39:41,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:39:41,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:39:41,017 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,047 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,095 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 4097, 65, 129, 3, 10, 3, 70, 13]. 87 percent of accesses are in the largest equivalence class. The 4687 initializations are split as follows [2, 7, 256, 64, 4096, 64, 128, 2, 4, 0, 64, 0]. The 10 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 3, 1, 2, 4]. [2023-11-29 02:39:41,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,096 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,270 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:39:41,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:39:41,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:39:41,298 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:39:41,298 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (1/1) ... [2023-11-29 02:39:41,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:39:41,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:41,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:39:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 02:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 02:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 02:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 02:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:39:41,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 02:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 02:39:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 02:39:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 02:39:41,596 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:39:41,598 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:39:47,386 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:39:47,795 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:39:47,796 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-29 02:39:47,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:39:47 BoogieIcfgContainer [2023-11-29 02:39:47,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:39:47,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:39:47,799 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:39:47,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:39:47,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:39:39" (1/3) ... [2023-11-29 02:39:47,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ea90e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:39:47, skipping insertion in model container [2023-11-29 02:39:47,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:39:40" (2/3) ... [2023-11-29 02:39:47,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ea90e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:39:47, skipping insertion in model container [2023-11-29 02:39:47,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:39:47" (3/3) ... [2023-11-29 02:39:47,805 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_59_safe.c-amalgamation.i [2023-11-29 02:39:47,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:39:47,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:39:47,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:39:47,881 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;@7c4f7af1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:39:47,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:39:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:39:47,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:47,893 INFO L195 NwaCegarLoop]: trace histogram [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 02:39:47,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:47,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-29 02:39:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459449068] [2023-11-29 02:39:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:48,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:48,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459449068] [2023-11-29 02:39:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459449068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:39:48,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:39:48,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:39:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386734803] [2023-11-29 02:39:48,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:39:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:39:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:39:48,754 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:49,120 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-29 02:39:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:39:49,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 02:39:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:49,131 INFO L225 Difference]: With dead ends: 89 [2023-11-29 02:39:49,131 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 02:39:49,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:39:49,137 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:49,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 02:39:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 02:39:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-29 02:39:49,167 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-29 02:39:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-29 02:39:49,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-29 02:39:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:39:49,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:49,169 INFO L195 NwaCegarLoop]: trace histogram [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 02:39:49,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:39:49,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:49,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-29 02:39:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376443280] [2023-11-29 02:39:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:49,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376443280] [2023-11-29 02:39:49,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376443280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:39:49,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:39:49,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:39:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228474490] [2023-11-29 02:39:49,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:49,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:39:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:49,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:39:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:39:49,773 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:50,098 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-29 02:39:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:39:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 02:39:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:50,101 INFO L225 Difference]: With dead ends: 80 [2023-11-29 02:39:50,101 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 02:39:50,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:39:50,103 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:50,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 02:39:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 02:39:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-29 02:39:50,111 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-29 02:39:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:50,111 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-29 02:39:50,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-29 02:39:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:39:50,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:50,113 INFO L195 NwaCegarLoop]: trace histogram [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 02:39:50,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:39:50,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:50,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-29 02:39:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:50,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954002254] [2023-11-29 02:39:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:50,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954002254] [2023-11-29 02:39:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954002254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:39:50,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:39:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:39:50,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059397395] [2023-11-29 02:39:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:50,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:39:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:39:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:39:50,928 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:51,247 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-29 02:39:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:39:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 02:39:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:51,248 INFO L225 Difference]: With dead ends: 75 [2023-11-29 02:39:51,248 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 02:39:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:39:51,250 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:51,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 02:39:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 02:39:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-29 02:39:51,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-29 02:39:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:51,258 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-29 02:39:51,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-29 02:39:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 02:39:51,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:51,260 INFO L195 NwaCegarLoop]: trace histogram [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 02:39:51,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:39:51,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:51,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-29 02:39:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:51,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880510995] [2023-11-29 02:39:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:52,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880510995] [2023-11-29 02:39:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880510995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641243750] [2023-11-29 02:39:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:52,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:52,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:52,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:39:52,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:39:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:53,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:39:53,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:39:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:53,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:39:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:39:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641243750] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:39:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:39:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054304912] [2023-11-29 02:39:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:53,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:39:53,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:39:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:53,687 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:54,023 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-29 02:39:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:39:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 02:39:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:54,024 INFO L225 Difference]: With dead ends: 66 [2023-11-29 02:39:54,024 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 02:39:54,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:54,026 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:54,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 02:39:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 02:39:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-29 02:39:54,031 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-29 02:39:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:54,032 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-29 02:39:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-29 02:39:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 02:39:54,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:54,033 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-29 02:39:54,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:39:54,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:54,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-29 02:39:54,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434699292] [2023-11-29 02:39:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:54,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:39:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434699292] [2023-11-29 02:39:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434699292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993155101] [2023-11-29 02:39:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:55,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:39:55,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:39:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:56,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:39:56,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:39:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:39:56,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:39:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:39:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993155101] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:39:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:39:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454688721] [2023-11-29 02:39:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:56,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:39:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:39:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:56,421 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:56,740 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-29 02:39:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:39:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 02:39:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:56,742 INFO L225 Difference]: With dead ends: 57 [2023-11-29 02:39:56,742 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 02:39:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:56,743 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:56,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 02:39:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 02:39:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-29 02:39:56,749 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-29 02:39:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:56,749 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-29 02:39:56,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-29 02:39:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 02:39:56,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:56,750 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-29 02:39:56,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:39:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:56,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:56,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:56,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-29 02:39:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667061044] [2023-11-29 02:39:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:39:57,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667061044] [2023-11-29 02:39:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667061044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936497652] [2023-11-29 02:39:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:57,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:57,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:39:57,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:39:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:59,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:39:59,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:39:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:39:59,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:39:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:39:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936497652] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:59,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:39:59,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:39:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587681376] [2023-11-29 02:39:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:39:59,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:39:59,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:39:59,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:59,152 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:59,463 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-29 02:39:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:39:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 02:39:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:59,464 INFO L225 Difference]: With dead ends: 74 [2023-11-29 02:39:59,464 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 02:39:59,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:39:59,465 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:59,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:39:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 02:39:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 02:39:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-29 02:39:59,471 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-29 02:39:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:59,472 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-29 02:39:59,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:39:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-29 02:39:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 02:39:59,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:59,473 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:39:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:39:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:39:59,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:39:59,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-29 02:39:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119689346] [2023-11-29 02:39:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:59,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:40:00,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119689346] [2023-11-29 02:40:00,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119689346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59639792] [2023-11-29 02:40:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:00,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:00,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:40:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:01,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:40:01,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:40:01,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:01,654 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 02:40:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59639792] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:01,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 02:40:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050680550] [2023-11-29 02:40:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:40:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:40:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:40:01,656 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:01,956 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-29 02:40:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:40:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 02:40:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:01,958 INFO L225 Difference]: With dead ends: 64 [2023-11-29 02:40:01,958 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 02:40:01,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:40:01,959 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:01,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:40:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 02:40:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 02:40:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-29 02:40:01,964 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-29 02:40:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:01,965 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-29 02:40:01,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-29 02:40:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:40:01,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:01,966 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:01,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:40:02,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:02,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:02,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-29 02:40:02,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:02,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492603150] [2023-11-29 02:40:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:40:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:02,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492603150] [2023-11-29 02:40:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492603150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:02,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281806670] [2023-11-29 02:40:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:02,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:02,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:02,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:40:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:04,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:40:04,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:40:04,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:40:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281806670] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:04,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:04,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 02:40:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186435585] [2023-11-29 02:40:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:40:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:40:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:40:04,067 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:04,345 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-29 02:40:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:40:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 02:40:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:04,346 INFO L225 Difference]: With dead ends: 54 [2023-11-29 02:40:04,346 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 02:40:04,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:40:04,347 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:04,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:40:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 02:40:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 02:40:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-29 02:40:04,352 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-29 02:40:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:04,353 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-29 02:40:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-29 02:40:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 02:40:04,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:04,354 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:04,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:40:04,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:40:04,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:04,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-29 02:40:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:04,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893197139] [2023-11-29 02:40:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:40:05,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:05,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893197139] [2023-11-29 02:40:05,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893197139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:05,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611206326] [2023-11-29 02:40:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:05,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:05,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:05,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:40:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:06,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:40:06,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:40:06,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:40:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611206326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:06,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:06,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 02:40:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204096823] [2023-11-29 02:40:06,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:06,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:40:06,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:40:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:40:06,354 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:06,914 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-11-29 02:40:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:40:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 02:40:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:06,915 INFO L225 Difference]: With dead ends: 95 [2023-11-29 02:40:06,915 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 02:40:06,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:40:06,916 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:06,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:40:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 02:40:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 02:40:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-29 02:40:06,920 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 43 [2023-11-29 02:40:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:06,921 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-29 02:40:06,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-29 02:40:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 02:40:06,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:06,922 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:06,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:40:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:07,123 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:07,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash 528894503, now seen corresponding path program 2 times [2023-11-29 02:40:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:07,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701923699] [2023-11-29 02:40:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:40:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701923699] [2023-11-29 02:40:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701923699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387904083] [2023-11-29 02:40:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:40:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:07,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:07,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:40:09,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:40:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:09,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:40:09,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:40:09,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 02:40:09,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387904083] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:09,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:09,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-29 02:40:09,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68785747] [2023-11-29 02:40:09,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:40:09,379 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:09,779 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-29 02:40:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-29 02:40:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:09,780 INFO L225 Difference]: With dead ends: 70 [2023-11-29 02:40:09,781 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:40:09,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:40:09,782 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:09,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:40:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:40:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 02:40:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-29 02:40:09,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 53 [2023-11-29 02:40:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:09,788 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-29 02:40:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-29 02:40:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:40:09,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:09,789 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:09,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:40:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:40:09,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:09,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 1 times [2023-11-29 02:40:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145191845] [2023-11-29 02:40:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 02:40:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145191845] [2023-11-29 02:40:11,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145191845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:11,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053265472] [2023-11-29 02:40:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:11,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:11,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:11,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:11,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:40:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:12,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:40:12,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:40:12,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 02:40:12,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053265472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:12,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:12,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-29 02:40:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410278692] [2023-11-29 02:40:12,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:40:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:40:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:40:12,443 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:13,045 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-29 02:40:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:40:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-29 02:40:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:13,046 INFO L225 Difference]: With dead ends: 116 [2023-11-29 02:40:13,046 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 02:40:13,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:40:13,047 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:13,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 267 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:40:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 02:40:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 02:40:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-29 02:40:13,052 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-29 02:40:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:13,053 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-29 02:40:13,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-29 02:40:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:40:13,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:13,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:13,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:40:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:40:13,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 2 times [2023-11-29 02:40:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332400591] [2023-11-29 02:40:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:40:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:14,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332400591] [2023-11-29 02:40:14,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332400591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213697466] [2023-11-29 02:40:14,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:40:14,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:14,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:14,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:40:15,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:40:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:15,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:40:15,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:40:15,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:40:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213697466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:15,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:15,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-29 02:40:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755920482] [2023-11-29 02:40:15,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:40:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:40:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:40:15,586 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:16,229 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2023-11-29 02:40:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:40:16,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-29 02:40:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:16,230 INFO L225 Difference]: With dead ends: 126 [2023-11-29 02:40:16,230 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 02:40:16,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:40:16,231 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:16,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:40:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 02:40:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-29 02:40:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.323943661971831) internal successors, (94), 71 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-29 02:40:16,236 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 66 [2023-11-29 02:40:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:16,236 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-29 02:40:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-29 02:40:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 02:40:16,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:16,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:16,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 02:40:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:16,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -789509461, now seen corresponding path program 3 times [2023-11-29 02:40:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:16,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825735747] [2023-11-29 02:40:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 02:40:17,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:17,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825735747] [2023-11-29 02:40:17,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825735747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:17,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358567882] [2023-11-29 02:40:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:40:17,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:17,365 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:17,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:40:18,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:40:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:18,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:40:18,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 02:40:18,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 02:40:18,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358567882] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:18,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:18,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2023-11-29 02:40:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881117700] [2023-11-29 02:40:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:40:18,786 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:19,168 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2023-11-29 02:40:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-29 02:40:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:19,169 INFO L225 Difference]: With dead ends: 104 [2023-11-29 02:40:19,170 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 02:40:19,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:40:19,171 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:19,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 112 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:40:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 02:40:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 02:40:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-29 02:40:19,178 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 67 [2023-11-29 02:40:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:19,178 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-29 02:40:19,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-29 02:40:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 02:40:19,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:19,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:19,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:40:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:19,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:19,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1264911644, now seen corresponding path program 1 times [2023-11-29 02:40:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41073162] [2023-11-29 02:40:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 02:40:20,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:20,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41073162] [2023-11-29 02:40:20,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41073162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:20,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582478424] [2023-11-29 02:40:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:20,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:20,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:40:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:21,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 5631 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:40:21,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 02:40:21,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:40:21,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582478424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:40:21,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:40:21,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 02:40:21,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698419336] [2023-11-29 02:40:21,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:21,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:21,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:40:21,562 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:21,954 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2023-11-29 02:40:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-29 02:40:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:21,955 INFO L225 Difference]: With dead ends: 129 [2023-11-29 02:40:21,955 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 02:40:21,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:40:21,956 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:40:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 02:40:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-29 02:40:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-29 02:40:21,962 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 70 [2023-11-29 02:40:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:21,962 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-29 02:40:21,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-29 02:40:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 02:40:21,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:21,963 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:21,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:40:22,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:22,164 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:22,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:22,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1148367932, now seen corresponding path program 1 times [2023-11-29 02:40:22,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:22,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890720592] [2023-11-29 02:40:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:22,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:40:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890720592] [2023-11-29 02:40:22,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890720592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385498952] [2023-11-29 02:40:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:22,989 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:22,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:40:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:24,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:40:24,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:40:24,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 02:40:24,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385498952] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:24,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:24,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 16 [2023-11-29 02:40:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444075802] [2023-11-29 02:40:24,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:24,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:40:24,314 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:24,649 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2023-11-29 02:40:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-29 02:40:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:24,651 INFO L225 Difference]: With dead ends: 129 [2023-11-29 02:40:24,651 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 02:40:24,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:40:24,652 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:24,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:40:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 02:40:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 02:40:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-11-29 02:40:24,657 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 73 [2023-11-29 02:40:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:24,657 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-11-29 02:40:24,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-11-29 02:40:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 02:40:24,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:24,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:24,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:40:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:24,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1864594645, now seen corresponding path program 1 times [2023-11-29 02:40:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809238640] [2023-11-29 02:40:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:24,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 02:40:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809238640] [2023-11-29 02:40:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809238640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698892640] [2023-11-29 02:40:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:25,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:25,707 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:25,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:40:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:26,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 5650 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:40:26,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 02:40:26,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 02:40:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698892640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:27,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 8] total 16 [2023-11-29 02:40:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698245994] [2023-11-29 02:40:27,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:40:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:40:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:40:27,157 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:28,294 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2023-11-29 02:40:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:40:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-29 02:40:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:28,296 INFO L225 Difference]: With dead ends: 149 [2023-11-29 02:40:28,296 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 02:40:28,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:40:28,297 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:28,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 354 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:40:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 02:40:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-29 02:40:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 93 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2023-11-29 02:40:28,302 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 74 [2023-11-29 02:40:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:28,303 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2023-11-29 02:40:28,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2023-11-29 02:40:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:40:28,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:28,304 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:28,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:40:28,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:28,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:28,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1696741860, now seen corresponding path program 2 times [2023-11-29 02:40:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81593727] [2023-11-29 02:40:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:28,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 02:40:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81593727] [2023-11-29 02:40:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81593727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657315393] [2023-11-29 02:40:29,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:40:29,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:29,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:29,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:40:31,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:40:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:31,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 5763 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:40:31,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 02:40:31,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-29 02:40:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657315393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:31,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:31,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 26 [2023-11-29 02:40:31,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936663562] [2023-11-29 02:40:31,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:31,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:40:31,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:31,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:40:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:40:31,350 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:33,005 INFO L93 Difference]: Finished difference Result 178 states and 236 transitions. [2023-11-29 02:40:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:40:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-29 02:40:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:33,007 INFO L225 Difference]: With dead ends: 178 [2023-11-29 02:40:33,007 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 02:40:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:40:33,008 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:33,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 924 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:40:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 02:40:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-29 02:40:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-11-29 02:40:33,014 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 93 [2023-11-29 02:40:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:33,014 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-11-29 02:40:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-11-29 02:40:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 02:40:33,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:33,015 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:33,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:40:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:33,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1183577982, now seen corresponding path program 3 times [2023-11-29 02:40:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151902423] [2023-11-29 02:40:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 02:40:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151902423] [2023-11-29 02:40:34,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151902423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450508419] [2023-11-29 02:40:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:40:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:34,540 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:34,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:40:37,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:40:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:37,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:40:37,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2023-11-29 02:40:37,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 02:40:37,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450508419] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:37,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:37,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14, 5] total 19 [2023-11-29 02:40:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429837912] [2023-11-29 02:40:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:40:37,319 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:37,683 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2023-11-29 02:40:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-11-29 02:40:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:37,684 INFO L225 Difference]: With dead ends: 132 [2023-11-29 02:40:37,684 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 02:40:37,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:40:37,685 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:37,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 112 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:40:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 02:40:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-29 02:40:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.292929292929293) internal successors, (128), 99 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-11-29 02:40:37,692 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 98 [2023-11-29 02:40:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:37,692 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-11-29 02:40:37,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-11-29 02:40:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 02:40:37,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:37,693 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:37,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:40:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:37,894 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash -132685079, now seen corresponding path program 1 times [2023-11-29 02:40:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:37,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160018888] [2023-11-29 02:40:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 02:40:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160018888] [2023-11-29 02:40:39,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160018888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259496051] [2023-11-29 02:40:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:39,197 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:40:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:40,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 5796 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:40:40,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 02:40:40,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-29 02:40:40,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259496051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:40,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:40,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 7] total 24 [2023-11-29 02:40:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323508643] [2023-11-29 02:40:40,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:40:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:40:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:40:40,617 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:42,406 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2023-11-29 02:40:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:40:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-29 02:40:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:42,408 INFO L225 Difference]: With dead ends: 158 [2023-11-29 02:40:42,408 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 02:40:42,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:40:42,409 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 63 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 846 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 02:40:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 02:40:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-11-29 02:40:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3) internal successors, (156), 120 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2023-11-29 02:40:42,415 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 99 [2023-11-29 02:40:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:42,415 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2023-11-29 02:40:42,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2023-11-29 02:40:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 02:40:42,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:42,416 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:42,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:40:42,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:42,617 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:42,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1400755345, now seen corresponding path program 2 times [2023-11-29 02:40:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:42,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881824512] [2023-11-29 02:40:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 02:40:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881824512] [2023-11-29 02:40:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881824512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492748264] [2023-11-29 02:40:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:40:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:44,034 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:44,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:40:45,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:40:45,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:45,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 5922 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:40:45,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:40:45,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-29 02:40:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492748264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:46,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:46,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 13] total 37 [2023-11-29 02:40:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117018031] [2023-11-29 02:40:46,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:46,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:40:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:40:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:40:46,019 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:52,905 INFO L93 Difference]: Finished difference Result 215 states and 293 transitions. [2023-11-29 02:40:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:40:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-11-29 02:40:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:52,906 INFO L225 Difference]: With dead ends: 215 [2023-11-29 02:40:52,906 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 02:40:52,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 02:40:52,908 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 195 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:52,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 862 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 02:40:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 02:40:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2023-11-29 02:40:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3081761006289307) internal successors, (208), 159 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2023-11-29 02:40:52,918 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 120 [2023-11-29 02:40:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:52,918 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2023-11-29 02:40:52,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2023-11-29 02:40:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 02:40:52,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:52,920 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:52,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:40:53,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:53,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:53,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash -508552599, now seen corresponding path program 3 times [2023-11-29 02:40:53,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:53,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815762070] [2023-11-29 02:40:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-11-29 02:40:54,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:54,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815762070] [2023-11-29 02:40:54,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815762070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:54,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685553367] [2023-11-29 02:40:54,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:40:54,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:54,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:54,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:54,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:40:57,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:40:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:57,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:40:57,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2023-11-29 02:40:57,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2023-11-29 02:40:57,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685553367] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:57,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:40:57,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 6] total 22 [2023-11-29 02:40:57,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363775937] [2023-11-29 02:40:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:40:57,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:40:57,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:40:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:40:57,172 INFO L87 Difference]: Start difference. First operand 160 states and 208 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:57,550 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2023-11-29 02:40:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:40:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-11-29 02:40:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:57,551 INFO L225 Difference]: With dead ends: 171 [2023-11-29 02:40:57,551 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 02:40:57,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:40:57,552 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:57,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:40:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 02:40:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-29 02:40:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2023-11-29 02:40:57,560 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 159 [2023-11-29 02:40:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:57,560 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2023-11-29 02:40:57,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2023-11-29 02:40:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-29 02:40:57,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:57,562 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:57,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 02:40:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:40:57,762 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:57,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1229781546, now seen corresponding path program 1 times [2023-11-29 02:40:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:57,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953770954] [2023-11-29 02:40:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 02:40:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953770954] [2023-11-29 02:40:59,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953770954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138679545] [2023-11-29 02:40:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:59,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:59,461 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:59,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:41:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:00,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 6161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:41:00,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 02:41:00,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 360 proven. 494 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 02:41:02,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138679545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:02,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:02,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 30] total 45 [2023-11-29 02:41:02,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766726154] [2023-11-29 02:41:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:02,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 02:41:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 02:41:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 02:41:02,015 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:41:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:19,968 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2023-11-29 02:41:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 02:41:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2023-11-29 02:41:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:19,970 INFO L225 Difference]: With dead ends: 296 [2023-11-29 02:41:19,970 INFO L226 Difference]: Without dead ends: 206 [2023-11-29 02:41:19,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=714, Invalid=2592, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:41:19,972 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 232 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:19,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1452 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 02:41:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-29 02:41:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-29 02:41:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3121951219512196) internal successors, (269), 205 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:41:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2023-11-29 02:41:19,986 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 160 [2023-11-29 02:41:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:19,986 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2023-11-29 02:41:19,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:41:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2023-11-29 02:41:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-29 02:41:19,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:19,988 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 22, 22, 22, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:20,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:41:20,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:41:20,189 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:41:20,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:20,189 INFO L85 PathProgramCache]: Analyzing trace with hash -82907376, now seen corresponding path program 2 times [2023-11-29 02:41:20,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:20,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824901217] [2023-11-29 02:41:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:20,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 02:41:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:41:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824901217] [2023-11-29 02:41:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824901217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:41:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559605654] [2023-11-29 02:41:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:41:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:41:23,354 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:41:23,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:41:24,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:41:24,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:41:24,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 6431 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 02:41:24,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1832 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-29 02:41:25,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2023-11-29 02:41:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559605654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:27,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 25] total 77 [2023-11-29 02:41:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924134527] [2023-11-29 02:41:27,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 02:41:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 02:41:27,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=5144, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 02:41:27,193 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:20,747 INFO L93 Difference]: Finished difference Result 373 states and 515 transitions. [2023-11-29 02:44:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 02:44:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2023-11-29 02:44:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:20,749 INFO L225 Difference]: With dead ends: 373 [2023-11-29 02:44:20,750 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 02:44:20,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 169.8s TimeCoverageRelationStatistics Valid=1763, Invalid=7938, Unknown=1, NotChecked=0, Total=9702 [2023-11-29 02:44:20,753 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 618 mSDsluCounter, 4250 mSDsCounter, 0 mSdLazyCounter, 8723 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 8725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:20,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 4336 Invalid, 8725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8723 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 02:44:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 02:44:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2023-11-29 02:44:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3178571428571428) internal successors, (369), 280 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 369 transitions. [2023-11-29 02:44:20,768 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 369 transitions. Word has length 205 [2023-11-29 02:44:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:20,769 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 369 transitions. [2023-11-29 02:44:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 369 transitions. [2023-11-29 02:44:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-11-29 02:44:20,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:20,771 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 29, 29, 29, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:20,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:44:20,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:44:20,972 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:20,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1800432854, now seen corresponding path program 3 times [2023-11-29 02:44:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:20,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607213713] [2023-11-29 02:44:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3179 trivial. 0 not checked. [2023-11-29 02:44:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607213713] [2023-11-29 02:44:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607213713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068746287] [2023-11-29 02:44:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:44:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:24,642 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:24,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:44:26,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:44:26,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:26,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 02:44:26,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-11-29 02:44:26,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4424 trivial. 0 not checked. [2023-11-29 02:44:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068746287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:27,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:27,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 8, 8] total 44 [2023-11-29 02:44:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561619041] [2023-11-29 02:44:27,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:27,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:44:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:44:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:44:27,403 INFO L87 Difference]: Start difference. First operand 281 states and 369 transitions. Second operand has 44 states, 44 states have (on average 4.045454545454546) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:30,802 INFO L93 Difference]: Finished difference Result 479 states and 636 transitions. [2023-11-29 02:44:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:44:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.045454545454546) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2023-11-29 02:44:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:30,804 INFO L225 Difference]: With dead ends: 479 [2023-11-29 02:44:30,804 INFO L226 Difference]: Without dead ends: 317 [2023-11-29 02:44:30,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 02:44:30,806 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 128 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 3643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:30,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1589 Invalid, 3643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 02:44:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-29 02:44:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2023-11-29 02:44:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.3203883495145632) internal successors, (408), 309 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 408 transitions. [2023-11-29 02:44:30,831 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 408 transitions. Word has length 280 [2023-11-29 02:44:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:30,831 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 408 transitions. [2023-11-29 02:44:30,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.045454545454546) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 408 transitions. [2023-11-29 02:44:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-29 02:44:30,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:30,833 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 30, 30, 30, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:30,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:44:31,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:44:31,034 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:31,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1267327331, now seen corresponding path program 4 times [2023-11-29 02:44:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279189119] [2023-11-29 02:44:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-29 02:44:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:35,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279189119] [2023-11-29 02:44:35,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279189119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:35,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310739854] [2023-11-29 02:44:35,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:44:35,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:35,324 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:35,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:44:36,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:44:36,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:37,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 6918 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 02:44:37,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-29 02:44:37,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 1456 proven. 2670 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 02:44:41,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310739854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:41,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:41,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 64] total 96 [2023-11-29 02:44:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721494670] [2023-11-29 02:44:41,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-29 02:44:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-29 02:44:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=7908, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 02:44:41,814 INFO L87 Difference]: Start difference. First operand 310 states and 408 transitions. Second operand has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:54:14,452 INFO L93 Difference]: Finished difference Result 594 states and 817 transitions. [2023-11-29 02:54:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 02:54:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2023-11-29 02:54:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:54:14,455 INFO L225 Difference]: With dead ends: 594 [2023-11-29 02:54:14,455 INFO L226 Difference]: Without dead ends: 406 [2023-11-29 02:54:14,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 570.5s TimeCoverageRelationStatistics Valid=3159, Invalid=12588, Unknown=3, NotChecked=0, Total=15750 [2023-11-29 02:54:14,461 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1157 mSDsluCounter, 4156 mSDsCounter, 0 mSdLazyCounter, 7118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 4225 SdHoareTripleChecker+Invalid, 7121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:54:14,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 4225 Invalid, 7121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7118 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 02:54:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-29 02:54:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-11-29 02:54:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3234567901234568) internal successors, (536), 405 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 536 transitions. [2023-11-29 02:54:14,487 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 536 transitions. Word has length 287 [2023-11-29 02:54:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:54:14,488 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 536 transitions. [2023-11-29 02:54:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 536 transitions. [2023-11-29 02:54:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-11-29 02:54:14,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:54:14,491 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 46, 46, 46, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:54:14,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 02:54:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1607c554-5d45-480d-8691-e1fee7dd376b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:54:14,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:54:14,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:54:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1900116637, now seen corresponding path program 5 times [2023-11-29 02:54:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:54:14,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844142676] [2023-11-29 02:54:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:54:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:54:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat