./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --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 a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:36:14,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:36:14,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:36:14,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:36:14,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:36:14,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:36:14,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:36:14,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:36:14,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:36:14,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:36:14,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:36:14,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:36:14,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:36:14,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:36:14,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:36:14,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:36:14,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:36:14,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:36:14,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:36:14,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:36:14,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:36:14,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:36:14,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:36:14,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:36:14,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:36:14,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:36:14,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:36:14,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:36:14,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:36:14,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:36:14,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:36:14,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:36:14,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:36:14,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:36:14,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:36:14,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:36:14,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:36:14,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:36:14,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:36:14,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:36:14,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:36:14,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:36:15,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:36:15,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:36:15,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:36:15,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:36:15,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:36:15,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:36:15,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:36:15,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:36:15,056 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:36:15,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:36:15,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:36:15,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:36:15,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:36:15,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:36:15,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:36:15,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:36:15,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:36:15,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:36:15,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:36:15,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:36:15,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:36:15,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:36:15,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:36:15,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:36:15,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:36:15,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:36:15,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:36:15,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:36:15,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:36:15,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:36:15,065 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:36:15,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:36:15,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:36:15,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:36:15,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e [2021-11-13 17:36:15,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:36:15,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:36:15,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:36:15,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:36:15,438 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:36:15,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-11-13 17:36:15,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/data/cfab54d54/a7b4a6c57d0a43bf9b3a1462a6ac8f70/FLAGe322cdbdd [2021-11-13 17:36:16,446 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:36:16,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2021-11-13 17:36:16,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/data/cfab54d54/a7b4a6c57d0a43bf9b3a1462a6ac8f70/FLAGe322cdbdd [2021-11-13 17:36:16,866 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/data/cfab54d54/a7b4a6c57d0a43bf9b3a1462a6ac8f70 [2021-11-13 17:36:16,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:36:16,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:36:16,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:36:16,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:36:16,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:36:16,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:36:16" (1/1) ... [2021-11-13 17:36:16,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8028ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:16, skipping insertion in model container [2021-11-13 17:36:16,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:36:16" (1/1) ... [2021-11-13 17:36:16,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:36:17,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:36:17,468 WARN L228 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_e9625f3f-4561-4476-86ed-50d27f6b0f25/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-11-13 17:36:18,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:36:18,718 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:36:18,768 WARN L228 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_e9625f3f-4561-4476-86ed-50d27f6b0f25/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2021-11-13 17:36:19,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:36:19,711 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:36:19,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19 WrapperNode [2021-11-13 17:36:19,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:36:19,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:36:19,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:36:19,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:36:19,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:19,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:20,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:36:20,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:36:20,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:36:20,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:36:20,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:20,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:20,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:20,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:21,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:21,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:21,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:21,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:36:21,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:36:21,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:36:21,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:36:21,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (1/1) ... [2021-11-13 17:36:21,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:36:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:36:21,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:36:21,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:36:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:36:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:36:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:36:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:36:28,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:36:28,417 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:36:28,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:36:28 BoogieIcfgContainer [2021-11-13 17:36:28,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:36:28,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:36:28,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:36:28,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:36:28,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:36:16" (1/3) ... [2021-11-13 17:36:28,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b3f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:36:28, skipping insertion in model container [2021-11-13 17:36:28,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:36:19" (2/3) ... [2021-11-13 17:36:28,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b3f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:36:28, skipping insertion in model container [2021-11-13 17:36:28,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:36:28" (3/3) ... [2021-11-13 17:36:28,437 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label37.c [2021-11-13 17:36:28,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:36:28,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:36:28,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:36:28,512 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:36:28,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:36:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-11-13 17:36:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-13 17:36:28,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:28,580 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:28,580 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:28,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-13 17:36:28,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:28,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938993784] [2021-11-13 17:36:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:28,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:28,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:28,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938993784] [2021-11-13 17:36:28,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938993784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:28,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:36:28,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339683146] [2021-11-13 17:36:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:29,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:29,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:29,057 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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) [2021-11-13 17:36:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:35,175 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-11-13 17:36:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 54 [2021-11-13 17:36:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:35,210 INFO L225 Difference]: With dead ends: 3121 [2021-11-13 17:36:35,211 INFO L226 Difference]: Without dead ends: 1944 [2021-11-13 17:36:35,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:35,224 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 935 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4724.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.30ms SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5812.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:35,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 50.30ms Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 5812.69ms Time] [2021-11-13 17:36:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-11-13 17:36:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-11-13 17:36:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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) [2021-11-13 17:36:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-11-13 17:36:35,387 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 54 [2021-11-13 17:36:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:35,388 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-11-13 17:36:35,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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) [2021-11-13 17:36:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-11-13 17:36:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 17:36:35,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:35,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:35,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:36:35,395 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 916312146, now seen corresponding path program 1 times [2021-11-13 17:36:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:35,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457763617] [2021-11-13 17:36:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:35,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:35,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:35,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457763617] [2021-11-13 17:36:35,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457763617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:35,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:35,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:36:35,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377063804] [2021-11-13 17:36:35,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:35,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:35,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:35,625 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2021-11-13 17:36:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:40,732 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-11-13 17:36:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 119 [2021-11-13 17:36:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:40,756 INFO L225 Difference]: With dead ends: 5351 [2021-11-13 17:36:40,756 INFO L226 Difference]: Without dead ends: 3480 [2021-11-13 17:36:40,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:40,767 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4143.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.63ms SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4883.93ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 35.63ms Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 4883.93ms Time] [2021-11-13 17:36:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-13 17:36:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-11-13 17:36:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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) [2021-11-13 17:36:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-11-13 17:36:40,874 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 119 [2021-11-13 17:36:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:40,879 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-11-13 17:36:40,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2021-11-13 17:36:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-11-13 17:36:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 17:36:40,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:40,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:40,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:36:40,891 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash -717638515, now seen corresponding path program 1 times [2021-11-13 17:36:40,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234375068] [2021-11-13 17:36:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:40,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:41,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:41,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234375068] [2021-11-13 17:36:41,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234375068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:41,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:41,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:36:41,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443419223] [2021-11-13 17:36:41,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:41,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:41,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:41,079 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-11-13 17:36:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:45,805 INFO L93 Difference]: Finished difference Result 10142 states and 15438 transitions. [2021-11-13 17:36:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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 121 [2021-11-13 17:36:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:45,850 INFO L225 Difference]: With dead ends: 10142 [2021-11-13 17:36:45,850 INFO L226 Difference]: Without dead ends: 6665 [2021-11-13 17:36:45,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:45,859 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 976 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3786.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.86ms SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4546.54ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:45,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 877 Invalid, 3325 Unknown, 0 Unchecked, 27.86ms Time], IncrementalHoareTripleChecker [772 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 4546.54ms Time] [2021-11-13 17:36:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2021-11-13 17:36:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6657. [2021-11-13 17:36:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 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) [2021-11-13 17:36:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-11-13 17:36:46,141 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 121 [2021-11-13 17:36:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:46,142 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-11-13 17:36:46,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-11-13 17:36:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-11-13 17:36:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 17:36:46,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:46,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:36:46,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -523925634, now seen corresponding path program 1 times [2021-11-13 17:36:46,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:46,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871681908] [2021-11-13 17:36:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:46,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:46,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:46,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871681908] [2021-11-13 17:36:46,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871681908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:46,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:46,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:36:46,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940564166] [2021-11-13 17:36:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:46,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:46,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:46,230 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:36:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:50,511 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-11-13 17:36:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:50,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-13 17:36:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:50,583 INFO L225 Difference]: With dead ends: 19637 [2021-11-13 17:36:50,583 INFO L226 Difference]: Without dead ends: 12982 [2021-11-13 17:36:50,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:50,595 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3383.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.30ms SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4081.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:50,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 18.30ms Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 4081.99ms Time] [2021-11-13 17:36:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-11-13 17:36:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2021-11-13 17:36:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 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) [2021-11-13 17:36:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2021-11-13 17:36:50,901 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 127 [2021-11-13 17:36:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:50,903 INFO L470 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2021-11-13 17:36:50,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:36:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2021-11-13 17:36:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 17:36:50,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:50,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:50,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:36:50,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1324072554, now seen corresponding path program 1 times [2021-11-13 17:36:50,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:50,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985699847] [2021-11-13 17:36:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:50,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:51,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:51,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985699847] [2021-11-13 17:36:51,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985699847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:51,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:51,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:36:51,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247285385] [2021-11-13 17:36:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:51,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:51,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:51,107 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-13 17:36:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:54,827 INFO L93 Difference]: Finished difference Result 25135 states and 31306 transitions. [2021-11-13 17:36:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2021-11-13 17:36:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:54,865 INFO L225 Difference]: With dead ends: 25135 [2021-11-13 17:36:54,866 INFO L226 Difference]: Without dead ends: 12962 [2021-11-13 17:36:54,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:54,880 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2863.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3457.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:54,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 11.83ms Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 3457.12ms Time] [2021-11-13 17:36:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2021-11-13 17:36:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 12962. [2021-11-13 17:36:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12961 states have (on average 1.2379446030398888) internal successors, (16045), 12961 states have internal predecessors, (16045), 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) [2021-11-13 17:36:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 16045 transitions. [2021-11-13 17:36:55,138 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 16045 transitions. Word has length 143 [2021-11-13 17:36:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:55,139 INFO L470 AbstractCegarLoop]: Abstraction has 12962 states and 16045 transitions. [2021-11-13 17:36:55,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-13 17:36:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 16045 transitions. [2021-11-13 17:36:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 17:36:55,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:55,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:55,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:36:55,143 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1155556459, now seen corresponding path program 1 times [2021-11-13 17:36:55,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:55,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941194335] [2021-11-13 17:36:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:55,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:55,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:55,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941194335] [2021-11-13 17:36:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941194335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:55,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:55,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:36:55,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837950295] [2021-11-13 17:36:55,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:55,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:55,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:55,252 INFO L87 Difference]: Start difference. First operand 12962 states and 16045 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-11-13 17:36:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:59,343 INFO L93 Difference]: Finished difference Result 31448 states and 39970 transitions. [2021-11-13 17:36:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:36:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 150 [2021-11-13 17:36:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:59,387 INFO L225 Difference]: With dead ends: 31448 [2021-11-13 17:36:59,387 INFO L226 Difference]: Without dead ends: 19275 [2021-11-13 17:36:59,400 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:36:59,401 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 909 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3192.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.37ms SdHoareTripleChecker+Time, 908 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3889.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:59,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 957 Invalid, 3299 Unknown, 0 Unchecked, 15.37ms Time], IncrementalHoareTripleChecker [908 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 3889.05ms Time] [2021-11-13 17:36:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19275 states. [2021-11-13 17:36:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19275 to 18478. [2021-11-13 17:36:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18478 states, 18477 states have (on average 1.2248200465443524) internal successors, (22631), 18477 states have internal predecessors, (22631), 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) [2021-11-13 17:36:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18478 states to 18478 states and 22631 transitions. [2021-11-13 17:36:59,718 INFO L78 Accepts]: Start accepts. Automaton has 18478 states and 22631 transitions. Word has length 150 [2021-11-13 17:36:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:59,719 INFO L470 AbstractCegarLoop]: Abstraction has 18478 states and 22631 transitions. [2021-11-13 17:36:59,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-11-13 17:36:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18478 states and 22631 transitions. [2021-11-13 17:36:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-13 17:36:59,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:59,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:36:59,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1592160981, now seen corresponding path program 1 times [2021-11-13 17:36:59,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:59,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815091394] [2021-11-13 17:36:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:59,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 17:36:59,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:59,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815091394] [2021-11-13 17:36:59,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815091394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:36:59,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:36:59,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:36:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488698415] [2021-11-13 17:36:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:36:59,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:36:59,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:36:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:36:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:36:59,885 INFO L87 Difference]: Start difference. First operand 18478 states and 22631 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-11-13 17:37:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:04,562 INFO L93 Difference]: Finished difference Result 42487 states and 53153 transitions. [2021-11-13 17:37:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:37:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 239 [2021-11-13 17:37:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:04,621 INFO L225 Difference]: With dead ends: 42487 [2021-11-13 17:37:04,622 INFO L226 Difference]: Without dead ends: 24798 [2021-11-13 17:37:04,645 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:37:04,646 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 996 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3693.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.57ms SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4407.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:04,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 795 Invalid, 3412 Unknown, 0 Unchecked, 16.57ms Time], IncrementalHoareTripleChecker [1023 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 4407.27ms Time] [2021-11-13 17:37:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24798 states. [2021-11-13 17:37:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24798 to 24786. [2021-11-13 17:37:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.230260238047206) internal successors, (30492), 24785 states have internal predecessors, (30492), 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) [2021-11-13 17:37:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30492 transitions. [2021-11-13 17:37:05,143 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30492 transitions. Word has length 239 [2021-11-13 17:37:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:05,143 INFO L470 AbstractCegarLoop]: Abstraction has 24786 states and 30492 transitions. [2021-11-13 17:37:05,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-11-13 17:37:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30492 transitions. [2021-11-13 17:37:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-13 17:37:05,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:05,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:05,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:37:05,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -28316692, now seen corresponding path program 1 times [2021-11-13 17:37:05,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:05,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129946096] [2021-11-13 17:37:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:05,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:37:05,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:05,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129946096] [2021-11-13 17:37:05,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129946096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:05,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:05,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:05,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252363208] [2021-11-13 17:37:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:05,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:37:05,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:37:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:05,460 INFO L87 Difference]: Start difference. First operand 24786 states and 30492 transitions. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 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) [2021-11-13 17:37:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:11,532 INFO L93 Difference]: Finished difference Result 73224 states and 90680 transitions. [2021-11-13 17:37:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:37:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 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 316 [2021-11-13 17:37:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:11,623 INFO L225 Difference]: With dead ends: 73224 [2021-11-13 17:37:11,623 INFO L226 Difference]: Without dead ends: 49227 [2021-11-13 17:37:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:11,651 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 2294 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4768.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.63ms SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5687.53ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:11,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2294 Valid, 757 Invalid, 4836 Unknown, 0 Unchecked, 33.63ms Time], IncrementalHoareTripleChecker [849 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 5687.53ms Time] [2021-11-13 17:37:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49227 states. [2021-11-13 17:37:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49227 to 49213. [2021-11-13 17:37:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49213 states, 49212 states have (on average 1.2029992684711046) internal successors, (59202), 49212 states have internal predecessors, (59202), 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) [2021-11-13 17:37:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49213 states to 49213 states and 59202 transitions. [2021-11-13 17:37:12,627 INFO L78 Accepts]: Start accepts. Automaton has 49213 states and 59202 transitions. Word has length 316 [2021-11-13 17:37:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:12,629 INFO L470 AbstractCegarLoop]: Abstraction has 49213 states and 59202 transitions. [2021-11-13 17:37:12,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 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) [2021-11-13 17:37:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 49213 states and 59202 transitions. [2021-11-13 17:37:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-13 17:37:12,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:12,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:12,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:37:12,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1413029796, now seen corresponding path program 1 times [2021-11-13 17:37:12,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:12,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428791753] [2021-11-13 17:37:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:12,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 17:37:12,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:12,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428791753] [2021-11-13 17:37:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428791753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:12,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:12,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781873702] [2021-11-13 17:37:12,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:37:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:37:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:12,826 INFO L87 Difference]: Start difference. First operand 49213 states and 59202 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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) [2021-11-13 17:37:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:22,721 INFO L93 Difference]: Finished difference Result 138781 states and 168388 transitions. [2021-11-13 17:37:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:37:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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 342 [2021-11-13 17:37:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:22,873 INFO L225 Difference]: With dead ends: 138781 [2021-11-13 17:37:22,873 INFO L226 Difference]: Without dead ends: 90357 [2021-11-13 17:37:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:22,924 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 1709 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 7204 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7762.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 8185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.91ms SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 7204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9244.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:22,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 1140 Invalid, 8185 Unknown, 0 Unchecked, 42.91ms Time], IncrementalHoareTripleChecker [981 Valid, 7204 Invalid, 0 Unknown, 0 Unchecked, 9244.63ms Time] [2021-11-13 17:37:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90357 states. [2021-11-13 17:37:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90357 to 90227. [2021-11-13 17:37:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90227 states, 90226 states have (on average 1.1906656617826348) internal successors, (107429), 90226 states have internal predecessors, (107429), 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) [2021-11-13 17:37:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90227 states to 90227 states and 107429 transitions. [2021-11-13 17:37:24,524 INFO L78 Accepts]: Start accepts. Automaton has 90227 states and 107429 transitions. Word has length 342 [2021-11-13 17:37:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 90227 states and 107429 transitions. [2021-11-13 17:37:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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) [2021-11-13 17:37:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 90227 states and 107429 transitions. [2021-11-13 17:37:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-13 17:37:24,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:24,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:24,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:37:24,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1271299818, now seen corresponding path program 1 times [2021-11-13 17:37:24,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:24,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850907891] [2021-11-13 17:37:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:24,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:37:24,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:24,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850907891] [2021-11-13 17:37:24,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850907891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:25,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608577684] [2021-11-13 17:37:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:25,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:25,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:25,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:25,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:37:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:37:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 17:37:27,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:37:27,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608577684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:27,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:37:27,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-13 17:37:27,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463297084] [2021-11-13 17:37:27,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:37:27,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:37:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:37:27,753 INFO L87 Difference]: Start difference. First operand 90227 states and 107429 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-11-13 17:37:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:31,879 INFO L93 Difference]: Finished difference Result 167867 states and 201404 transitions. [2021-11-13 17:37:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:37:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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 345 [2021-11-13 17:37:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:31,991 INFO L225 Difference]: With dead ends: 167867 [2021-11-13 17:37:31,991 INFO L226 Difference]: Without dead ends: 93390 [2021-11-13 17:37:32,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:37:32,028 INFO L933 BasicCegarLoop]: 1088 mSDtfsCounter, 643 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2872.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.86ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3568.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:32,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1225 Invalid, 2616 Unknown, 0 Unchecked, 12.86ms Time], IncrementalHoareTripleChecker [111 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3568.05ms Time] [2021-11-13 17:37:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93390 states. [2021-11-13 17:37:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93390 to 91801. [2021-11-13 17:37:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91801 states, 91800 states have (on average 1.1878322440087146) internal successors, (109043), 91800 states have internal predecessors, (109043), 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) [2021-11-13 17:37:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91801 states to 91801 states and 109043 transitions. [2021-11-13 17:37:33,664 INFO L78 Accepts]: Start accepts. Automaton has 91801 states and 109043 transitions. Word has length 345 [2021-11-13 17:37:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:33,665 INFO L470 AbstractCegarLoop]: Abstraction has 91801 states and 109043 transitions. [2021-11-13 17:37:33,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2021-11-13 17:37:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91801 states and 109043 transitions. [2021-11-13 17:37:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-13 17:37:33,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:33,676 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:33,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 17:37:33,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:33,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash -850235256, now seen corresponding path program 1 times [2021-11-13 17:37:33,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:33,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171699676] [2021-11-13 17:37:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:33,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-13 17:37:34,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:34,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171699676] [2021-11-13 17:37:34,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171699676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:34,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:34,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:34,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006290343] [2021-11-13 17:37:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:34,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:37:34,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:37:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:37:34,172 INFO L87 Difference]: Start difference. First operand 91801 states and 109043 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2021-11-13 17:37:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:38,803 INFO L93 Difference]: Finished difference Result 182817 states and 217304 transitions. [2021-11-13 17:37:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:37:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 403 [2021-11-13 17:37:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:38,919 INFO L225 Difference]: With dead ends: 182817 [2021-11-13 17:37:38,919 INFO L226 Difference]: Without dead ends: 91805 [2021-11-13 17:37:38,951 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:37:38,952 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 954 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3249.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.88ms SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3887.72ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:38,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 1520 Invalid, 3109 Unknown, 0 Unchecked, 16.88ms Time], IncrementalHoareTripleChecker [614 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 3887.72ms Time] [2021-11-13 17:37:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91805 states. [2021-11-13 17:37:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91805 to 91793. [2021-11-13 17:37:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1372995468014642) internal successors, (104395), 91792 states have internal predecessors, (104395), 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) [2021-11-13 17:37:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104395 transitions. [2021-11-13 17:37:40,634 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104395 transitions. Word has length 403 [2021-11-13 17:37:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 91793 states and 104395 transitions. [2021-11-13 17:37:40,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2021-11-13 17:37:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104395 transitions. [2021-11-13 17:37:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-13 17:37:40,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:40,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:40,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:37:40,645 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -137763772, now seen corresponding path program 1 times [2021-11-13 17:37:40,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:40,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509613770] [2021-11-13 17:37:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:40,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 17:37:40,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:40,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509613770] [2021-11-13 17:37:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509613770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:40,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:40,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:37:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926246546] [2021-11-13 17:37:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:37:40,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:37:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:37:40,999 INFO L87 Difference]: Start difference. First operand 91793 states and 104395 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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) [2021-11-13 17:37:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:45,773 INFO L93 Difference]: Finished difference Result 167847 states and 192284 transitions. [2021-11-13 17:37:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:37:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 427 [2021-11-13 17:37:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:46,100 INFO L225 Difference]: With dead ends: 167847 [2021-11-13 17:37:46,100 INFO L226 Difference]: Without dead ends: 91804 [2021-11-13 17:37:46,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:37:46,130 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 725 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3597.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.38ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4243.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:46,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1234 Invalid, 2733 Unknown, 0 Unchecked, 14.38ms Time], IncrementalHoareTripleChecker [4 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 4243.77ms Time] [2021-11-13 17:37:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91804 states. [2021-11-13 17:37:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91804 to 91793. [2021-11-13 17:37:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1367548370228342) internal successors, (104345), 91792 states have internal predecessors, (104345), 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) [2021-11-13 17:37:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104345 transitions. [2021-11-13 17:37:47,445 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104345 transitions. Word has length 427 [2021-11-13 17:37:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:47,446 INFO L470 AbstractCegarLoop]: Abstraction has 91793 states and 104345 transitions. [2021-11-13 17:37:47,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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) [2021-11-13 17:37:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104345 transitions. [2021-11-13 17:37:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-13 17:37:47,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:47,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:47,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:37:47,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 44906732, now seen corresponding path program 1 times [2021-11-13 17:37:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:47,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233510683] [2021-11-13 17:37:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:47,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 17:37:47,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:47,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233510683] [2021-11-13 17:37:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233510683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:47,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:47,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:47,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876698386] [2021-11-13 17:37:47,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:47,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:37:47,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:37:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:37:47,684 INFO L87 Difference]: Start difference. First operand 91793 states and 104345 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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) [2021-11-13 17:37:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:53,980 INFO L93 Difference]: Finished difference Result 246518 states and 281711 transitions. [2021-11-13 17:37:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:37:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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 434 [2021-11-13 17:37:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:54,179 INFO L225 Difference]: With dead ends: 246518 [2021-11-13 17:37:54,179 INFO L226 Difference]: Without dead ends: 152363 [2021-11-13 17:37:54,218 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:37:54,219 INFO L933 BasicCegarLoop]: 1761 mSDtfsCounter, 888 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4581.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.70ms SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5388.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:54,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1897 Invalid, 3259 Unknown, 0 Unchecked, 22.70ms Time], IncrementalHoareTripleChecker [803 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 5388.62ms Time] [2021-11-13 17:37:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152363 states. [2021-11-13 17:37:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152363 to 142120. [2021-11-13 17:37:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142120 states, 142119 states have (on average 1.108148804874788) internal successors, (157489), 142119 states have internal predecessors, (157489), 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) [2021-11-13 17:37:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142120 states to 142120 states and 157489 transitions. [2021-11-13 17:37:56,545 INFO L78 Accepts]: Start accepts. Automaton has 142120 states and 157489 transitions. Word has length 434 [2021-11-13 17:37:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 142120 states and 157489 transitions. [2021-11-13 17:37:56,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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) [2021-11-13 17:37:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 142120 states and 157489 transitions. [2021-11-13 17:37:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-13 17:37:56,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:56,556 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:56,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:37:56,557 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1669071297, now seen corresponding path program 1 times [2021-11-13 17:37:56,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:56,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552446493] [2021-11-13 17:37:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:56,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 75 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-11-13 17:37:57,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:57,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552446493] [2021-11-13 17:37:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552446493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:57,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698140717] [2021-11-13 17:37:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:57,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:57,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:57,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:57,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:37:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:37:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-13 17:37:59,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:37:59,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698140717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:59,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:37:59,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-13 17:37:59,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152329231] [2021-11-13 17:37:59,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:59,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:37:59,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:37:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:37:59,025 INFO L87 Difference]: Start difference. First operand 142120 states and 157489 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2021-11-13 17:38:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:03,959 INFO L93 Difference]: Finished difference Result 283440 states and 314176 transitions. [2021-11-13 17:38:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:38:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 451 [2021-11-13 17:38:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:04,153 INFO L225 Difference]: With dead ends: 283440 [2021-11-13 17:38:04,153 INFO L226 Difference]: Without dead ends: 142109 [2021-11-13 17:38:04,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:38:04,210 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 1005 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3013.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.85ms SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3657.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:04,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 755 Invalid, 2817 Unknown, 0 Unchecked, 15.85ms Time], IncrementalHoareTripleChecker [516 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 3657.27ms Time] [2021-11-13 17:38:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142109 states. [2021-11-13 17:38:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142109 to 142106. [2021-11-13 17:38:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142106 states, 142105 states have (on average 1.0810808908905387) internal successors, (153627), 142105 states have internal predecessors, (153627), 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) [2021-11-13 17:38:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142106 states to 142106 states and 153627 transitions. [2021-11-13 17:38:06,647 INFO L78 Accepts]: Start accepts. Automaton has 142106 states and 153627 transitions. Word has length 451 [2021-11-13 17:38:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:06,648 INFO L470 AbstractCegarLoop]: Abstraction has 142106 states and 153627 transitions. [2021-11-13 17:38:06,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2021-11-13 17:38:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 142106 states and 153627 transitions. [2021-11-13 17:38:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-13 17:38:06,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:06,658 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:06,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:38:06,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 17:38:06,860 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:38:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1601864273, now seen corresponding path program 1 times [2021-11-13 17:38:06,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:06,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989324405] [2021-11-13 17:38:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:06,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-13 17:38:07,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:07,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989324405] [2021-11-13 17:38:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989324405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:07,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:07,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:38:07,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948965098] [2021-11-13 17:38:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:07,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:38:07,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:38:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:38:07,188 INFO L87 Difference]: Start difference. First operand 142106 states and 153627 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2021-11-13 17:38:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:12,679 INFO L93 Difference]: Finished difference Result 283421 states and 306461 transitions. [2021-11-13 17:38:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:38:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 456 [2021-11-13 17:38:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:12,898 INFO L225 Difference]: With dead ends: 283421 [2021-11-13 17:38:12,898 INFO L226 Difference]: Without dead ends: 142104 [2021-11-13 17:38:13,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:38:13,531 INFO L933 BasicCegarLoop]: 1314 mSDtfsCounter, 1108 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3282.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.17ms SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3997.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:13,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 1392 Invalid, 2792 Unknown, 0 Unchecked, 20.17ms Time], IncrementalHoareTripleChecker [421 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 3997.12ms Time] [2021-11-13 17:38:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142104 states. [2021-11-13 17:38:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142104 to 142103. [2021-11-13 17:38:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142103 states, 142102 states have (on average 1.0619414223585875) internal successors, (150904), 142102 states have internal predecessors, (150904), 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) [2021-11-13 17:38:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142103 states to 142103 states and 150904 transitions. [2021-11-13 17:38:15,454 INFO L78 Accepts]: Start accepts. Automaton has 142103 states and 150904 transitions. Word has length 456 [2021-11-13 17:38:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:15,455 INFO L470 AbstractCegarLoop]: Abstraction has 142103 states and 150904 transitions. [2021-11-13 17:38:15,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2021-11-13 17:38:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 142103 states and 150904 transitions. [2021-11-13 17:38:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-13 17:38:15,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:15,471 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:15,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:38:15,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:38:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -312690779, now seen corresponding path program 1 times [2021-11-13 17:38:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:15,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628705827] [2021-11-13 17:38:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:15,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 558 proven. 100 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-13 17:38:15,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:15,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628705827] [2021-11-13 17:38:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628705827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:15,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984058084] [2021-11-13 17:38:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:15,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:38:15,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:38:15,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:38:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:38:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:38:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 17:38:18,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:38:18,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984058084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:18,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:38:18,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 17:38:18,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708497989] [2021-11-13 17:38:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:18,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:38:18,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:38:18,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:38:18,848 INFO L87 Difference]: Start difference. First operand 142103 states and 150904 transitions. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2021-11-13 17:38:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:25,111 INFO L93 Difference]: Finished difference Result 275542 states and 293229 transitions. [2021-11-13 17:38:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:38:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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 545 [2021-11-13 17:38:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:25,281 INFO L225 Difference]: With dead ends: 275542 [2021-11-13 17:38:25,281 INFO L226 Difference]: Without dead ends: 149187 [2021-11-13 17:38:25,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:38:25,330 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 1610 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4014.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 4805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.09ms SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4890.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:25,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 876 Invalid, 4805 Unknown, 0 Unchecked, 26.09ms Time], IncrementalHoareTripleChecker [353 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 4890.69ms Time] [2021-11-13 17:38:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149187 states. [2021-11-13 17:38:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149187 to 146825. [2021-11-13 17:38:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146825 states, 146824 states have (on average 1.06099820192884) internal successors, (155780), 146824 states have internal predecessors, (155780), 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) [2021-11-13 17:38:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146825 states to 146825 states and 155780 transitions. [2021-11-13 17:38:27,926 INFO L78 Accepts]: Start accepts. Automaton has 146825 states and 155780 transitions. Word has length 545 [2021-11-13 17:38:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:27,942 INFO L470 AbstractCegarLoop]: Abstraction has 146825 states and 155780 transitions. [2021-11-13 17:38:27,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2021-11-13 17:38:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 146825 states and 155780 transitions. [2021-11-13 17:38:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-11-13 17:38:27,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:27,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:27,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:38:28,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9625f3f-4561-4476-86ed-50d27f6b0f25/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:38:28,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:38:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash -705129669, now seen corresponding path program 1 times [2021-11-13 17:38:28,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:28,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717602162] [2021-11-13 17:38:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:28,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 587 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-13 17:38:28,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:28,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717602162] [2021-11-13 17:38:28,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717602162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:28,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:28,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:38:28,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888971730] [2021-11-13 17:38:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:38:28,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:38:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:38:28,465 INFO L87 Difference]: Start difference. First operand 146825 states and 155780 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-11-13 17:38:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:33,485 INFO L93 Difference]: Finished difference Result 295257 states and 313203 transitions. [2021-11-13 17:38:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:38:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 549 [2021-11-13 17:38:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:33,673 INFO L225 Difference]: With dead ends: 295257 [2021-11-13 17:38:33,674 INFO L226 Difference]: Without dead ends: 147642 [2021-11-13 17:38:33,736 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:38:33,737 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 718 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3490.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.27ms SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4098.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:33,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1802 Invalid, 2693 Unknown, 0 Unchecked, 15.27ms Time], IncrementalHoareTripleChecker [267 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 4098.57ms Time] [2021-11-13 17:38:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147642 states. [2021-11-13 17:38:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147642 to 141301. [2021-11-13 17:38:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141301 states, 141300 states have (on average 1.055166312809625) internal successors, (149095), 141300 states have internal predecessors, (149095), 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)