./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/vdp_6_unsafe.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_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/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_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/vdp_6_unsafe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/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_7ed27961-5506-4ff4-8716-abab9c127e05/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 8439b3a99a90c492a6e0d709e55259e0aa26f505dee855ac51dc17a80a34a78d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:48:18,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:48:18,850 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:48:18,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:48:18,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:48:18,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:48:18,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:48:18,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:48:18,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:48:18,882 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:48:18,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:48:18,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:48:18,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:48:18,884 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:48:18,885 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:48:18,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:48:18,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:48:18,887 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:48:18,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:48:18,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:48:18,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:48:18,889 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:48:18,889 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:48:18,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:48:18,890 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:48:18,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:48:18,891 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:48:18,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:48:18,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:48:18,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:48:18,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:48:18,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:48:18,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:48:18,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:48:18,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:48:18,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:48:18,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:48:18,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:48:18,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:48:18,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:48:18,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:48:18,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:48:18,896 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_7ed27961-5506-4ff4-8716-abab9c127e05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8439b3a99a90c492a6e0d709e55259e0aa26f505dee855ac51dc17a80a34a78d [2023-11-29 05:48:19,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:48:19,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:48:19,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:48:19,143 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:48:19,143 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:48:19,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/vdp_6_unsafe.c-amalgamation.i [2023-11-29 05:48:21,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:48:22,208 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:48:22,209 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/sv-benchmarks/c/neural-networks/vdp_6_unsafe.c-amalgamation.i [2023-11-29 05:48:22,231 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/data/19c25ca0b/e118045c0242411989631b7a852110e4/FLAG6a1dd2bec [2023-11-29 05:48:22,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/data/19c25ca0b/e118045c0242411989631b7a852110e4 [2023-11-29 05:48:22,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:48:22,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:48:22,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:48:22,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:48:22,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:48:22,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:48:22" (1/1) ... [2023-11-29 05:48:22,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9d0d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:22, skipping insertion in model container [2023-11-29 05:48:22,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:48:22" (1/1) ... [2023-11-29 05:48:22,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:48:22,897 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_7ed27961-5506-4ff4-8716-abab9c127e05/sv-benchmarks/c/neural-networks/vdp_6_unsafe.c-amalgamation.i[63635,63648] [2023-11-29 05:48:23,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:48:23,075 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:48:23,119 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_7ed27961-5506-4ff4-8716-abab9c127e05/sv-benchmarks/c/neural-networks/vdp_6_unsafe.c-amalgamation.i[63635,63648] [2023-11-29 05:48:23,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:48:23,392 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:48:23,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23 WrapperNode [2023-11-29 05:48:23,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:48:23,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:48:23,394 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:48:23,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:48:23,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,565 INFO L138 Inliner]: procedures = 619, calls = 1412, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1680 [2023-11-29 05:48:23,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:48:23,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:48:23,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:48:23,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:48:23,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,592 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,631 INFO L175 MemorySlicer]: Split 1388 memory accesses to 12 slices as follows [2, 7, 97, 33, 1025, 33, 10, 97, 4, 38, 36, 6]. 74 percent of accesses are in the largest equivalence class. The 1356 initializations are split as follows [2, 7, 96, 32, 1024, 32, 0, 96, 3, 32, 32, 0]. The 8 writes are split as follows [0, 0, 0, 0, 0, 0, 3, 0, 0, 2, 2, 1]. [2023-11-29 05:48:23,632 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:48:23,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:48:23,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:48:23,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:48:23,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (1/1) ... [2023-11-29 05:48:23,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:48:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:23,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:48:23,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:48:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 05:48:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 05:48:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 05:48:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 05:48:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 05:48:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 05:48:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 05:48:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:48:23,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:48:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 05:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 05:48:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 05:48:23,979 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:48:23,981 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:48:25,558 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:48:25,706 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:48:25,706 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 05:48:25,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:48:25 BoogieIcfgContainer [2023-11-29 05:48:25,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:48:25,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:48:25,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:48:25,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:48:25,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:48:22" (1/3) ... [2023-11-29 05:48:25,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfaaea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:48:25, skipping insertion in model container [2023-11-29 05:48:25,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:48:23" (2/3) ... [2023-11-29 05:48:25,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfaaea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:48:25, skipping insertion in model container [2023-11-29 05:48:25,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:48:25" (3/3) ... [2023-11-29 05:48:25,715 INFO L112 eAbstractionObserver]: Analyzing ICFG vdp_6_unsafe.c-amalgamation.i [2023-11-29 05:48:25,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:48:25,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:48:25,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:48:25,787 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;@1a06cb9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:48:25,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:48:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 47 states have internal predecessors, (82), 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 05:48:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:48:25,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:25,799 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] [2023-11-29 05:48:25,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:25,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2012850619, now seen corresponding path program 1 times [2023-11-29 05:48:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981411203] [2023-11-29 05:48:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:26,301 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 05:48:26,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:26,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981411203] [2023-11-29 05:48:26,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981411203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:26,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:48:26,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:48:26,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747644345] [2023-11-29 05:48:26,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:48:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:48:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:48:26,340 INFO L87 Difference]: Start difference. First operand has 48 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 47 states have internal predecessors, (82), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 05:48:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:26,475 INFO L93 Difference]: Finished difference Result 93 states and 159 transitions. [2023-11-29 05:48:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:48:26,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2023-11-29 05:48:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:26,485 INFO L225 Difference]: With dead ends: 93 [2023-11-29 05:48:26,485 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 05:48:26,488 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 05:48:26,492 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:26,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 05:48:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 05:48:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 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 05:48:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2023-11-29 05:48:26,526 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 29 [2023-11-29 05:48:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:26,526 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2023-11-29 05:48:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 05:48:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2023-11-29 05:48:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:48:26,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:26,528 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] [2023-11-29 05:48:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:48:26,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:26,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2047546805, now seen corresponding path program 1 times [2023-11-29 05:48:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061901297] [2023-11-29 05:48:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:26,778 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 05:48:26,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061901297] [2023-11-29 05:48:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061901297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:26,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:48:26,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:48:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766475593] [2023-11-29 05:48:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:26,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:48:26,783 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 05:48:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:26,936 INFO L93 Difference]: Finished difference Result 84 states and 119 transitions. [2023-11-29 05:48:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2023-11-29 05:48:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:26,938 INFO L225 Difference]: With dead ends: 84 [2023-11-29 05:48:26,938 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 05:48:26,939 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 05:48:26,941 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:26,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 05:48:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 05:48:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 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 05:48:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2023-11-29 05:48:26,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 29 [2023-11-29 05:48:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:26,949 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2023-11-29 05:48:26,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 05:48:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2023-11-29 05:48:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:48:26,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:26,951 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] [2023-11-29 05:48:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:48:26,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:26,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2028565773, now seen corresponding path program 1 times [2023-11-29 05:48:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383288365] [2023-11-29 05:48:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:27,256 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 05:48:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383288365] [2023-11-29 05:48:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383288365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:27,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:48:27,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:48:27,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583373228] [2023-11-29 05:48:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:48:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:48:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:48:27,259 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 05:48:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:27,435 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-29 05:48:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:48:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2023-11-29 05:48:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:27,437 INFO L225 Difference]: With dead ends: 53 [2023-11-29 05:48:27,437 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 05:48:27,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:48:27,439 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:27,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 130 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:48:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 05:48:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 05:48:27,444 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 05:48:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-29 05:48:27,446 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 29 [2023-11-29 05:48:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:27,446 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-29 05:48:27,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 05:48:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-29 05:48:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:48:27,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:27,448 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] [2023-11-29 05:48:27,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:48:27,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:27,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2026718731, now seen corresponding path program 1 times [2023-11-29 05:48:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:27,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106643237] [2023-11-29 05:48:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:27,856 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 05:48:27,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106643237] [2023-11-29 05:48:27,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106643237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:27,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:48:27,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:48:27,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818758215] [2023-11-29 05:48:27,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:27,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:27,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:48:27,859 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 05:48:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:28,010 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2023-11-29 05:48:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2023-11-29 05:48:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:28,012 INFO L225 Difference]: With dead ends: 76 [2023-11-29 05:48:28,012 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 05:48:28,012 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 05:48:28,014 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:28,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 05:48:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-11-29 05:48:28,019 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 05:48:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-29 05:48:28,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 29 [2023-11-29 05:48:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:28,020 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-29 05:48:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 05:48:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-29 05:48:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:48:28,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:28,022 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] [2023-11-29 05:48:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:48:28,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:28,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2060179138, now seen corresponding path program 1 times [2023-11-29 05:48:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:28,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164097580] [2023-11-29 05:48:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:28,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:28,473 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 05:48:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164097580] [2023-11-29 05:48:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164097580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424096792] [2023-11-29 05:48:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:28,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:48:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:29,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:48:29,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:29,069 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 05:48:29,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:29,087 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 05:48:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424096792] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:29,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:48:29,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 05:48:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260731710] [2023-11-29 05:48:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:29,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:48:29,090 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:29,234 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2023-11-29 05:48:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:29,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 32 [2023-11-29 05:48:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:29,236 INFO L225 Difference]: With dead ends: 65 [2023-11-29 05:48:29,236 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 05:48:29,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 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 05:48:29,237 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:29,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 05:48:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 05:48:29,242 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 05:48:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-29 05:48:29,243 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2023-11-29 05:48:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:29,243 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-29 05:48:29,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 05:48:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-29 05:48:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:48:29,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:29,245 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] [2023-11-29 05:48:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:48:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:29,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:29,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1389601723, now seen corresponding path program 1 times [2023-11-29 05:48:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69228765] [2023-11-29 05:48:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:29,861 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 05:48:29,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69228765] [2023-11-29 05:48:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69228765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19440387] [2023-11-29 05:48:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:29,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:29,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:29,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:48:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:30,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:48:30,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:30,439 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 05:48:30,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:48:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19440387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:30,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:48:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 05:48:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386669960] [2023-11-29 05:48:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:48:30,441 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 05:48:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:30,588 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-11-29 05:48:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2023-11-29 05:48:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:30,589 INFO L225 Difference]: With dead ends: 86 [2023-11-29 05:48:30,590 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 05:48:30,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:48:30,591 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:30,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 05:48:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-29 05:48:30,596 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 05:48:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-29 05:48:30,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 35 [2023-11-29 05:48:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:30,597 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-29 05:48:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 05:48:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-29 05:48:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:48:30,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:30,598 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] [2023-11-29 05:48:30,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:48:30,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:30,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:30,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1232765958, now seen corresponding path program 1 times [2023-11-29 05:48:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748976261] [2023-11-29 05:48:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:31,240 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 05:48:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748976261] [2023-11-29 05:48:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748976261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108660729] [2023-11-29 05:48:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:31,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:31,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:31,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:48:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:31,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:48:31,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:31,821 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 05:48:31,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:31,836 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 05:48:31,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108660729] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:31,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:48:31,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 05:48:31,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611759436] [2023-11-29 05:48:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:31,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:31,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:48:31,839 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 05:48:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:31,977 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-11-29 05:48:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2023-11-29 05:48:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:31,984 INFO L225 Difference]: With dead ends: 72 [2023-11-29 05:48:31,984 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 05:48:31,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 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 05:48:31,986 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:31,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 05:48:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 05:48:31,991 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 05:48:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-29 05:48:31,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 38 [2023-11-29 05:48:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:31,992 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-29 05:48:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 05:48:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-29 05:48:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 05:48:31,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:31,993 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] [2023-11-29 05:48:32,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:48:32,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:32,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 112245872, now seen corresponding path program 1 times [2023-11-29 05:48:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684585697] [2023-11-29 05:48:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:32,565 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 05:48:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684585697] [2023-11-29 05:48:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684585697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754492862] [2023-11-29 05:48:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:32,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:32,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:32,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:48:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:33,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:48:33,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:33,138 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 05:48:33,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:33,152 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 05:48:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754492862] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:33,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:48:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 05:48:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91149906] [2023-11-29 05:48:33,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:48:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:48:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:48:33,154 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:33,294 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-11-29 05:48:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:48:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 05:48:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:33,295 INFO L225 Difference]: With dead ends: 62 [2023-11-29 05:48:33,295 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 05:48:33,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 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 05:48:33,297 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:33,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 05:48:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-29 05:48:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 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 05:48:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-11-29 05:48:33,302 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 41 [2023-11-29 05:48:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:33,302 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-11-29 05:48:33,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-11-29 05:48:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:48:33,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:33,304 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, 1] [2023-11-29 05:48:33,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:48:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:33,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:33,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1541916076, now seen corresponding path program 1 times [2023-11-29 05:48:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748967804] [2023-11-29 05:48:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:33,848 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 05:48:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748967804] [2023-11-29 05:48:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748967804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027973535] [2023-11-29 05:48:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:33,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:33,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:33,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:48:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:34,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:48:34,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:34,365 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 05:48:34,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:34,388 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 05:48:34,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027973535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:34,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:34,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 05:48:34,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480267437] [2023-11-29 05:48:34,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:34,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:48:34,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:48:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:48:34,390 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 05:48:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:34,555 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2023-11-29 05:48:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:48:34,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 44 [2023-11-29 05:48:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:34,556 INFO L225 Difference]: With dead ends: 90 [2023-11-29 05:48:34,557 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 05:48:34,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:48:34,558 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:34,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 05:48:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 05:48:34,564 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 05:48:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-29 05:48:34,564 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 44 [2023-11-29 05:48:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:34,565 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-29 05:48:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 05:48:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-29 05:48:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:48:34,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:34,566 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 05:48:34,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:48:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:34,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:34,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1917566771, now seen corresponding path program 2 times [2023-11-29 05:48:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:34,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562715576] [2023-11-29 05:48:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:48:35,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562715576] [2023-11-29 05:48:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562715576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101629118] [2023-11-29 05:48:35,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:48:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:35,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:35,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:48:35,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:48:35,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:35,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:48:35,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:48:35,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:48:35,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101629118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:35,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:35,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2023-11-29 05:48:35,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481428501] [2023-11-29 05:48:35,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:35,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:48:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:48:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:48:35,816 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 05:48:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:36,053 INFO L93 Difference]: Finished difference Result 104 states and 141 transitions. [2023-11-29 05:48:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:48:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 05:48:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:36,054 INFO L225 Difference]: With dead ends: 104 [2023-11-29 05:48:36,054 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 05:48:36,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:48:36,055 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:36,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 225 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:48:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 05:48:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2023-11-29 05:48:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 71 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 05:48:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2023-11-29 05:48:36,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 53 [2023-11-29 05:48:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:36,063 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2023-11-29 05:48:36,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 05:48:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2023-11-29 05:48:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 05:48:36,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:36,065 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-29 05:48:36,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:48:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:48:36,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:36,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1485773431, now seen corresponding path program 3 times [2023-11-29 05:48:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188676434] [2023-11-29 05:48:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:48:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188676434] [2023-11-29 05:48:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188676434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464831463] [2023-11-29 05:48:36,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:48:36,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:36,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:36,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:48:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:48:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:37,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:48:37,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-29 05:48:37,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:48:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464831463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:37,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:48:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-29 05:48:37,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219991354] [2023-11-29 05:48:37,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:48:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:48:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:48:37,298 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 05:48:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:37,413 INFO L93 Difference]: Finished difference Result 136 states and 182 transitions. [2023-11-29 05:48:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:48:37,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 65 [2023-11-29 05:48:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:37,414 INFO L225 Difference]: With dead ends: 136 [2023-11-29 05:48:37,414 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 05:48:37,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:48:37,415 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:37,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 05:48:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-11-29 05:48:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 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 05:48:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-11-29 05:48:37,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 65 [2023-11-29 05:48:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:37,421 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-11-29 05:48:37,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 05:48:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-11-29 05:48:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 05:48:37,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:37,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-29 05:48:37,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:48:37,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:37,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:37,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:37,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1924454441, now seen corresponding path program 1 times [2023-11-29 05:48:37,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:37,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755454231] [2023-11-29 05:48:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:37,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:48:38,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755454231] [2023-11-29 05:48:38,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755454231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196681711] [2023-11-29 05:48:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:38,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:38,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:38,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:38,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:48:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:38,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:48:38,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:48:38,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:38,884 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 05:48:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196681711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:38,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 18 [2023-11-29 05:48:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225424426] [2023-11-29 05:48:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:48:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:48:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:48:38,887 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 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 05:48:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:39,482 INFO L93 Difference]: Finished difference Result 135 states and 185 transitions. [2023-11-29 05:48:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:48:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 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 68 [2023-11-29 05:48:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:39,484 INFO L225 Difference]: With dead ends: 135 [2023-11-29 05:48:39,484 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 05:48:39,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:48:39,485 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:39,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 352 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:48:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 05:48:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2023-11-29 05:48:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 93 states have internal predecessors, (124), 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 05:48:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2023-11-29 05:48:39,490 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 68 [2023-11-29 05:48:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2023-11-29 05:48:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 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 05:48:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2023-11-29 05:48:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 05:48:39,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:39,492 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:39,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:48:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:39,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:39,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1362926526, now seen corresponding path program 2 times [2023-11-29 05:48:39,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:39,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29233256] [2023-11-29 05:48:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:39,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-29 05:48:40,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29233256] [2023-11-29 05:48:40,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29233256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767495732] [2023-11-29 05:48:40,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:48:40,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:40,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:48:40,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:48:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:40,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:48:40,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-29 05:48:40,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 05:48:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767495732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:41,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 24 [2023-11-29 05:48:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756826994] [2023-11-29 05:48:41,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:48:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:48:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:48:41,157 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 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 05:48:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:42,592 INFO L93 Difference]: Finished difference Result 175 states and 239 transitions. [2023-11-29 05:48:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:48:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 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 89 [2023-11-29 05:48:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:42,593 INFO L225 Difference]: With dead ends: 175 [2023-11-29 05:48:42,593 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 05:48:42,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:48:42,594 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:42,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 789 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:48:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 05:48:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-29 05:48:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3333333333333333) internal successors, (156), 117 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 05:48:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 156 transitions. [2023-11-29 05:48:42,600 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 156 transitions. Word has length 89 [2023-11-29 05:48:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:42,600 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 156 transitions. [2023-11-29 05:48:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 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 05:48:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 156 transitions. [2023-11-29 05:48:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 05:48:42,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:42,602 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:42,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:48:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:48:42,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:42,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1853866302, now seen corresponding path program 3 times [2023-11-29 05:48:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120428693] [2023-11-29 05:48:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-29 05:48:44,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120428693] [2023-11-29 05:48:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120428693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910145982] [2023-11-29 05:48:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:48:44,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:44,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:44,016 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:44,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:48:44,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:48:44,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:44,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:48:44,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 05:48:44,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:48:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910145982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:48:44,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:48:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-11-29 05:48:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334637736] [2023-11-29 05:48:44,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:48:44,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:48:44,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:48:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:48:44,600 INFO L87 Difference]: Start difference. First operand 118 states and 156 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 05:48:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:44,701 INFO L93 Difference]: Finished difference Result 176 states and 234 transitions. [2023-11-29 05:48:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:48:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 113 [2023-11-29 05:48:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:44,703 INFO L225 Difference]: With dead ends: 176 [2023-11-29 05:48:44,703 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 05:48:44,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:48:44,704 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:44,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:48:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 05:48:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-11-29 05:48:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 118 states have internal predecessors, (157), 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 05:48:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2023-11-29 05:48:44,712 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 113 [2023-11-29 05:48:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:44,712 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2023-11-29 05:48:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 05:48:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2023-11-29 05:48:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 05:48:44,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:44,714 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:44,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:48:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:48:44,914 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:44,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2058391213, now seen corresponding path program 1 times [2023-11-29 05:48:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:44,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961936351] [2023-11-29 05:48:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 05:48:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:45,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961936351] [2023-11-29 05:48:45,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961936351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078405381] [2023-11-29 05:48:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:45,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:45,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:45,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:48:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:46,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 05:48:46,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:48:46,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-11-29 05:48:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078405381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:47,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 13] total 39 [2023-11-29 05:48:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264443713] [2023-11-29 05:48:47,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:48:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:48:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:48:47,240 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 39 states, 39 states have (on average 4.282051282051282) internal successors, (167), 39 states have internal predecessors, (167), 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 05:48:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:54,945 INFO L93 Difference]: Finished difference Result 218 states and 301 transitions. [2023-11-29 05:48:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 05:48:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.282051282051282) internal successors, (167), 39 states have internal predecessors, (167), 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 116 [2023-11-29 05:48:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:54,947 INFO L225 Difference]: With dead ends: 218 [2023-11-29 05:48:54,947 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 05:48:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=450, Invalid=1902, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:48:54,949 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 180 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1282 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:48:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 05:48:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2023-11-29 05:48:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.3312101910828025) internal successors, (209), 157 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 05:48:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 209 transitions. [2023-11-29 05:48:54,959 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 209 transitions. Word has length 116 [2023-11-29 05:48:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:54,959 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 209 transitions. [2023-11-29 05:48:54,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.282051282051282) internal successors, (167), 39 states have internal predecessors, (167), 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 05:48:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 209 transitions. [2023-11-29 05:48:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 05:48:54,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:54,961 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:54,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:48:55,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:48:55,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:55,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1352542694, now seen corresponding path program 2 times [2023-11-29 05:48:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:55,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307652247] [2023-11-29 05:48:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:55,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-29 05:48:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307652247] [2023-11-29 05:48:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307652247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140048087] [2023-11-29 05:48:56,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:48:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:56,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:56,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:48:56,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:48:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:56,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 05:48:56,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-29 05:48:57,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 322 proven. 660 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-29 05:48:58,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140048087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:58,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:58,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 34] total 51 [2023-11-29 05:48:58,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225787306] [2023-11-29 05:48:58,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:58,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 05:48:58,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 05:48:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:48:58,379 INFO L87 Difference]: Start difference. First operand 158 states and 209 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 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 05:49:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:25,204 INFO L93 Difference]: Finished difference Result 303 states and 418 transitions. [2023-11-29 05:49:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 05:49:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 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 155 [2023-11-29 05:49:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:25,206 INFO L225 Difference]: With dead ends: 303 [2023-11-29 05:49:25,206 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 05:49:25,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 05:49:25,208 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 303 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:25,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1891 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:49:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 05:49:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-29 05:49:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.3317307692307692) internal successors, (277), 208 states have internal predecessors, (277), 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 05:49:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 277 transitions. [2023-11-29 05:49:25,232 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 277 transitions. Word has length 155 [2023-11-29 05:49:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:25,232 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 277 transitions. [2023-11-29 05:49:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 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 05:49:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 277 transitions. [2023-11-29 05:49:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-29 05:49:25,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:25,234 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:25,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:49:25,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:49:25,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:25,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1877014579, now seen corresponding path program 3 times [2023-11-29 05:49:25,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:25,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79067526] [2023-11-29 05:49:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:25,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2023-11-29 05:49:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79067526] [2023-11-29 05:49:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79067526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676726035] [2023-11-29 05:49:27,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:49:27,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:27,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:27,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:49:27,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:49:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:27,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:49:27,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 2207 trivial. 0 not checked. [2023-11-29 05:49:27,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2239 trivial. 0 not checked. [2023-11-29 05:49:27,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676726035] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:27,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:27,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25, 5] total 30 [2023-11-29 05:49:27,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050394106] [2023-11-29 05:49:27,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:49:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:49:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:49:27,920 INFO L87 Difference]: Start difference. First operand 209 states and 277 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 05:49:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:28,053 INFO L93 Difference]: Finished difference Result 226 states and 299 transitions. [2023-11-29 05:49:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:49:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 206 [2023-11-29 05:49:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:28,055 INFO L225 Difference]: With dead ends: 226 [2023-11-29 05:49:28,055 INFO L226 Difference]: Without dead ends: 210 [2023-11-29 05:49:28,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:49:28,056 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:28,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 124 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-29 05:49:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-11-29 05:49:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.3301435406698565) internal successors, (278), 209 states have internal predecessors, (278), 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 05:49:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 278 transitions. [2023-11-29 05:49:28,064 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 278 transitions. Word has length 206 [2023-11-29 05:49:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:28,065 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 278 transitions. [2023-11-29 05:49:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 05:49:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 278 transitions. [2023-11-29 05:49:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 05:49:28,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:28,067 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:28,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:49:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:49:28,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1608990794, now seen corresponding path program 1 times [2023-11-29 05:49:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:28,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277278157] [2023-11-29 05:49:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2023-11-29 05:49:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277278157] [2023-11-29 05:49:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277278157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048756010] [2023-11-29 05:49:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:29,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:29,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:29,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:49:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:30,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:49:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2239 trivial. 0 not checked. [2023-11-29 05:49:30,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048756010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:30,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:49:30,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2023-11-29 05:49:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115382165] [2023-11-29 05:49:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:30,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:49:30,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:49:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:49:30,673 INFO L87 Difference]: Start difference. First operand 210 states and 278 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 05:49:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:30,786 INFO L93 Difference]: Finished difference Result 410 states and 545 transitions. [2023-11-29 05:49:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:49:30,786 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 209 [2023-11-29 05:49:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:30,788 INFO L225 Difference]: With dead ends: 410 [2023-11-29 05:49:30,788 INFO L226 Difference]: Without dead ends: 211 [2023-11-29 05:49:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:49:30,789 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:30,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-29 05:49:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-29 05:49:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3285714285714285) internal successors, (279), 210 states have internal predecessors, (279), 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 05:49:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2023-11-29 05:49:30,797 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 209 [2023-11-29 05:49:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:30,797 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2023-11-29 05:49:30,798 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 05:49:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2023-11-29 05:49:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-29 05:49:30,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:30,799 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:30,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:49:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:49:31,000 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:31,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 383988624, now seen corresponding path program 1 times [2023-11-29 05:49:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643694122] [2023-11-29 05:49:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2023-11-29 05:49:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643694122] [2023-11-29 05:49:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643694122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887614194] [2023-11-29 05:49:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:32,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:32,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:32,668 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:32,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:49:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:33,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 05:49:33,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 2100 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-29 05:49:34,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2023-11-29 05:49:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887614194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:35,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 48, 25] total 72 [2023-11-29 05:49:35,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533619945] [2023-11-29 05:49:35,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 05:49:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 05:49:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=4500, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 05:49:35,426 INFO L87 Difference]: Start difference. First operand 211 states and 279 transitions. Second operand has 72 states, 72 states have (on average 3.5416666666666665) internal successors, (255), 72 states have internal predecessors, (255), 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 05:49:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:43,372 INFO L93 Difference]: Finished difference Result 260 states and 352 transitions. [2023-11-29 05:49:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 05:49:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.5416666666666665) internal successors, (255), 72 states have internal predecessors, (255), 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 210 [2023-11-29 05:49:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:43,374 INFO L225 Difference]: With dead ends: 260 [2023-11-29 05:49:43,374 INFO L226 Difference]: Without dead ends: 241 [2023-11-29 05:49:43,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=892, Invalid=5428, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 05:49:43,376 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 293 mSDsluCounter, 3985 mSDsCounter, 0 mSdLazyCounter, 7299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 4070 SdHoareTripleChecker+Invalid, 7300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:43,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 4070 Invalid, 7300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7299 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 05:49:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-29 05:49:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-11-29 05:49:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 240 states have internal predecessors, (319), 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 05:49:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2023-11-29 05:49:43,385 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 210 [2023-11-29 05:49:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:43,386 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2023-11-29 05:49:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.5416666666666665) internal successors, (255), 72 states have internal predecessors, (255), 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 05:49:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2023-11-29 05:49:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-11-29 05:49:43,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:43,397 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:43,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:43,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:43,598 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:43,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 479406000, now seen corresponding path program 2 times [2023-11-29 05:49:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:43,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754150848] [2023-11-29 05:49:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3044 trivial. 0 not checked. [2023-11-29 05:49:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754150848] [2023-11-29 05:49:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754150848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454878561] [2023-11-29 05:49:44,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:49:44,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:44,525 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:44,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:49:45,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:49:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:45,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 145 conjunts are in the unsatisfiable core [2023-11-29 05:49:45,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2023-11-29 05:49:45,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 1 proven. 1521 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2023-11-29 05:49:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454878561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:47,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:47,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 39] total 45 [2023-11-29 05:49:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906471955] [2023-11-29 05:49:47,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 05:49:47,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 05:49:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1880, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 05:49:47,068 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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 05:55:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:55:28,273 INFO L93 Difference]: Finished difference Result 487 states and 651 transitions. [2023-11-29 05:55:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 05:55:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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 240 [2023-11-29 05:55:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:55:28,275 INFO L225 Difference]: With dead ends: 487 [2023-11-29 05:55:28,275 INFO L226 Difference]: Without dead ends: 257 [2023-11-29 05:55:28,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 341.2s TimeCoverageRelationStatistics Valid=1315, Invalid=6693, Unknown=2, NotChecked=0, Total=8010 [2023-11-29 05:55:28,278 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 675 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:55:28,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1562 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:55:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-29 05:55:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-11-29 05:55:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.3203125) internal successors, (338), 256 states have internal predecessors, (338), 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 05:55:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2023-11-29 05:55:28,292 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 240 [2023-11-29 05:55:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:55:28,292 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2023-11-29 05:55:28,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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 05:55:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2023-11-29 05:55:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-29 05:55:28,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:55:28,295 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 8, 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] [2023-11-29 05:55:28,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:55:28,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:28,495 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:55:28,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2144693174, now seen corresponding path program 3 times [2023-11-29 05:55:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:28,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150408350] [2023-11-29 05:55:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:28,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 3092 trivial. 0 not checked. [2023-11-29 05:55:29,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:29,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150408350] [2023-11-29 05:55:29,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150408350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:29,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882616076] [2023-11-29 05:55:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:55:29,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:29,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:29,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:29,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:55:30,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:55:30,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:55:30,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:55:30,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3125 trivial. 0 not checked. [2023-11-29 05:55:30,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:55:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882616076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:30,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:55:30,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-29 05:55:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711095948] [2023-11-29 05:55:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:55:30,498 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 05:55:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:55:30,640 INFO L93 Difference]: Finished difference Result 384 states and 508 transitions. [2023-11-29 05:55:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 256 [2023-11-29 05:55:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:55:30,642 INFO L225 Difference]: With dead ends: 384 [2023-11-29 05:55:30,642 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 05:55:30,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:55:30,643 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:55:30,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:55:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 05:55:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2023-11-29 05:55:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3190661478599222) internal successors, (339), 257 states have internal predecessors, (339), 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 05:55:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 339 transitions. [2023-11-29 05:55:30,655 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 339 transitions. Word has length 256 [2023-11-29 05:55:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:55:30,655 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 339 transitions. [2023-11-29 05:55:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 05:55:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 339 transitions. [2023-11-29 05:55:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-29 05:55:30,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:55:30,656 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 8, 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 05:55:30,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:55:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:30,857 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:55:30,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1605190047, now seen corresponding path program 1 times [2023-11-29 05:55:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392045203] [2023-11-29 05:55:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 3093 trivial. 0 not checked. [2023-11-29 05:55:31,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:31,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392045203] [2023-11-29 05:55:31,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392045203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:31,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592089677] [2023-11-29 05:55:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:31,888 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:31,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:55:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:32,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 3154 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:55:32,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 3100 trivial. 0 not checked. [2023-11-29 05:55:32,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3126 trivial. 0 not checked. [2023-11-29 05:55:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592089677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:33,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:55:33,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 12 [2023-11-29 05:55:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185520028] [2023-11-29 05:55:33,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:55:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:55:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:55:33,009 INFO L87 Difference]: Start difference. First operand 258 states and 339 transitions. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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 05:55:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:55:33,255 INFO L93 Difference]: Finished difference Result 515 states and 683 transitions. [2023-11-29 05:55:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:55:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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 257 [2023-11-29 05:55:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:55:33,257 INFO L225 Difference]: With dead ends: 515 [2023-11-29 05:55:33,257 INFO L226 Difference]: Without dead ends: 268 [2023-11-29 05:55:33,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:55:33,258 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:55:33,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 283 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:55:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-29 05:55:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-11-29 05:55:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3146067415730338) internal successors, (351), 267 states have internal predecessors, (351), 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 05:55:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 351 transitions. [2023-11-29 05:55:33,270 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 351 transitions. Word has length 257 [2023-11-29 05:55:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:55:33,270 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 351 transitions. [2023-11-29 05:55:33,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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 05:55:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 351 transitions. [2023-11-29 05:55:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-29 05:55:33,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:55:33,272 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 12, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2023-11-29 05:55:33,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:55:33,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:55:33,472 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:55:33,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:33,473 INFO L85 PathProgramCache]: Analyzing trace with hash -896064023, now seen corresponding path program 2 times [2023-11-29 05:55:33,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:33,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285825776] [2023-11-29 05:55:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:33,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-11-29 05:55:34,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:34,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285825776] [2023-11-29 05:55:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285825776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:34,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333319442] [2023-11-29 05:55:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:55:34,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:34,775 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:34,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:55:35,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:55:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:55:35,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 05:55:35,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-11-29 05:55:35,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1 proven. 1632 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2023-11-29 05:55:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333319442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:37,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:55:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 42] total 53 [2023-11-29 05:55:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830534949] [2023-11-29 05:55:37,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:37,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:55:37,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:55:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2580, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:55:37,859 INFO L87 Difference]: Start difference. First operand 268 states and 351 transitions. Second operand has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 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 06:02:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:24,247 INFO L93 Difference]: Finished difference Result 561 states and 737 transitions. [2023-11-29 06:02:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 06:02:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 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 267 [2023-11-29 06:02:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:24,249 INFO L225 Difference]: With dead ends: 561 [2023-11-29 06:02:24,249 INFO L226 Difference]: Without dead ends: 304 [2023-11-29 06:02:24,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 406.7s TimeCoverageRelationStatistics Valid=1308, Invalid=6699, Unknown=3, NotChecked=0, Total=8010 [2023-11-29 06:02:24,252 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 670 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:24,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1864 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:02:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-29 06:02:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-11-29 06:02:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.297029702970297) internal successors, (393), 303 states have internal predecessors, (393), 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 06:02:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 393 transitions. [2023-11-29 06:02:24,269 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 393 transitions. Word has length 267 [2023-11-29 06:02:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 393 transitions. [2023-11-29 06:02:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 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 06:02:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 393 transitions. [2023-11-29 06:02:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 06:02:24,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:24,272 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 30, 10, 10, 10, 3, 3, 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, 1, 1, 1] [2023-11-29 06:02:24,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:02:24,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:02:24,472 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:24,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash 635145477, now seen corresponding path program 3 times [2023-11-29 06:02:24,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:24,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734060107] [2023-11-29 06:02:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:24,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 1 proven. 820 refuted. 0 times theorem prover too weak. 3116 trivial. 0 not checked. [2023-11-29 06:02:26,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734060107] [2023-11-29 06:02:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734060107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:02:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840370738] [2023-11-29 06:02:26,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:02:26,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:26,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:26,374 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:26,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:02:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:02:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:02:27,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:02:27,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3935 trivial. 0 not checked. [2023-11-29 06:02:27,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3935 trivial. 0 not checked. [2023-11-29 06:02:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840370738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:27,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:02:27,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 5] total 22 [2023-11-29 06:02:27,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341186195] [2023-11-29 06:02:27,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:02:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:02:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:02:27,867 INFO L87 Difference]: Start difference. First operand 304 states and 393 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 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 06:02:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:28,778 INFO L93 Difference]: Finished difference Result 620 states and 805 transitions. [2023-11-29 06:02:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:02:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 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) Word has length 303 [2023-11-29 06:02:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:28,781 INFO L225 Difference]: With dead ends: 620 [2023-11-29 06:02:28,781 INFO L226 Difference]: Without dead ends: 327 [2023-11-29 06:02:28,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:02:28,782 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 74 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:28,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 842 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:02:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-29 06:02:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2023-11-29 06:02:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.2928348909657321) internal successors, (415), 321 states have internal predecessors, (415), 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 06:02:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 415 transitions. [2023-11-29 06:02:28,812 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 415 transitions. Word has length 303 [2023-11-29 06:02:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:28,813 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 415 transitions. [2023-11-29 06:02:28,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 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 06:02:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 415 transitions. [2023-11-29 06:02:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-29 06:02:28,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:28,815 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 11, 11, 11, 4, 4, 4, 4, 3, 3, 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] [2023-11-29 06:02:28,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:02:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:29,016 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:29,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 841439493, now seen corresponding path program 4 times [2023-11-29 06:02:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:29,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941827050] [2023-11-29 06:02:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 1 proven. 1001 refuted. 0 times theorem prover too weak. 3164 trivial. 0 not checked. [2023-11-29 06:02:31,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:31,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941827050] [2023-11-29 06:02:31,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941827050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:02:31,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792314816] [2023-11-29 06:02:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:02:31,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:31,127 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:31,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed27961-5506-4ff4-8716-abab9c127e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:02:32,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:02:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:02:32,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 3462 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 06:02:32,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 1 proven. 1001 refuted. 0 times theorem prover too weak. 3164 trivial. 0 not checked. [2023-11-29 06:02:32,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 1 proven. 2521 refuted. 0 times theorem prover too weak. 1644 trivial. 0 not checked. [2023-11-29 06:02:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792314816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:36,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:02:36,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 49] total 74 [2023-11-29 06:02:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801892821] [2023-11-29 06:02:36,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:36,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 06:02:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 06:02:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=4904, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 06:02:36,835 INFO L87 Difference]: Start difference. First operand 322 states and 415 transitions. Second operand has 74 states, 74 states have (on average 3.810810810810811) internal successors, (282), 74 states have internal predecessors, (282), 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)