./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:41:50,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:41:50,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:41:50,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:41:50,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:41:50,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:41:50,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:41:50,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:41:50,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:41:50,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:41:50,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:41:50,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:41:50,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:41:50,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:41:50,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:41:50,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:41:50,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:41:50,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:41:50,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:41:50,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:41:50,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:41:50,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:41:50,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:41:50,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:41:50,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:41:50,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:41:50,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:41:50,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:41:50,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:41:50,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:41:50,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:41:50,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:41:50,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:41:50,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:41:50,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:41:50,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:41:50,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:41:50,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:41:50,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:41:50,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:41:50,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:41:50,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:41:50,132 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:41:50,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:41:50,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:41:50,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:41:50,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:41:50,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:41:50,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:41:50,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:41:50,134 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:41:50,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:41:50,135 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:41:50,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:41:50,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:41:50,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:41:50,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:41:50,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:41:50,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:41:50,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:41:50,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:41:50,137 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_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-12-06 18:41:50,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:41:50,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:41:50,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:41:50,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:41:50,334 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:41:50,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-06 18:41:50,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/data/085d09168/e6d17034c96d4178a43bd0c7f8552122/FLAG2acbbc2b8 [2021-12-06 18:41:50,790 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:41:50,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-06 18:41:50,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/data/085d09168/e6d17034c96d4178a43bd0c7f8552122/FLAG2acbbc2b8 [2021-12-06 18:41:50,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/data/085d09168/e6d17034c96d4178a43bd0c7f8552122 [2021-12-06 18:41:50,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:41:50,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:41:50,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:41:50,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:41:50,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:41:50,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:41:50" (1/1) ... [2021-12-06 18:41:50,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb1bdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:50, skipping insertion in model container [2021-12-06 18:41:50,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:41:50" (1/1) ... [2021-12-06 18:41:50,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:41:50,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:41:51,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:41:51,053 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:41:51,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:41:51,101 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:41:51,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51 WrapperNode [2021-12-06 18:41:51,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:41:51,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:41:51,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:41:51,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:41:51,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,145 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-06 18:41:51,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:41:51,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:41:51,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:41:51,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:41:51,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:41:51,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:41:51,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:41:51,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:41:51,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (1/1) ... [2021-12-06 18:41:51,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:41:51,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:51,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:41:51,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:41:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:41:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:41:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:41:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:41:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:41:51,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:41:51,295 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:41:51,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:41:51,421 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:41:51,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:41:51,426 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:41:51,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:41:51 BoogieIcfgContainer [2021-12-06 18:41:51,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:41:51,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:41:51,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:41:51,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:41:51,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:41:50" (1/3) ... [2021-12-06 18:41:51,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ed147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:41:51, skipping insertion in model container [2021-12-06 18:41:51,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:41:51" (2/3) ... [2021-12-06 18:41:51,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ed147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:41:51, skipping insertion in model container [2021-12-06 18:41:51,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:41:51" (3/3) ... [2021-12-06 18:41:51,434 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2021-12-06 18:41:51,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:41:51,438 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-06 18:41:51,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:41:51,475 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-06 18:41:51,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-06 18:41:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:41:51,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:51,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:51,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2021-12-06 18:41:51,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:51,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814388764] [2021-12-06 18:41:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:51,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:51,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:51,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814388764] [2021-12-06 18:41:51,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814388764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:51,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:51,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:51,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17305782] [2021-12-06 18:41:51,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:51,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:51,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:51,676 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:51,781 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-12-06 18:41:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:41:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:51,790 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:41:51,790 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 18:41:51,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:51,794 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:51,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 18:41:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2021-12-06 18:41:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 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) [2021-12-06 18:41:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-06 18:41:51,821 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-12-06 18:41:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:51,821 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-06 18:41:51,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-06 18:41:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:41:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:51,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:41:51,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2021-12-06 18:41:51,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287805807] [2021-12-06 18:41:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:51,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:51,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:51,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287805807] [2021-12-06 18:41:51,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287805807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:51,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:51,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:41:51,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126067200] [2021-12-06 18:41:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:51,848 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:51,870 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-06 18:41:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:41:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:51,871 INFO L225 Difference]: With dead ends: 46 [2021-12-06 18:41:51,871 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:41:51,871 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 [2021-12-06 18:41:51,872 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:41:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-06 18:41:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-06 18:41:51,877 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-06 18:41:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:51,877 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-06 18:41:51,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-06 18:41:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:41:51,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:51,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:51,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:41:51,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-06 18:41:51,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:51,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973931469] [2021-12-06 18:41:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:51,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:51,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973931469] [2021-12-06 18:41:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973931469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:51,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:51,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:51,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793044251] [2021-12-06 18:41:51,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:51,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:51,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:51,922 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:51,943 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-06 18:41:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 18:41:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:51,944 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:41:51,944 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:41:51,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:51,946 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:51,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:41:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2021-12-06 18:41:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 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) [2021-12-06 18:41:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-06 18:41:51,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-06 18:41:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:51,951 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-06 18:41:51,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-06 18:41:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:41:51,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:51,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:51,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:41:51,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-06 18:41:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:51,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415747148] [2021-12-06 18:41:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:51,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:51,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415747148] [2021-12-06 18:41:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415747148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:51,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:51,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:51,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355830597] [2021-12-06 18:41:51,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:51,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:51,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:51,997 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,039 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-06 18:41:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 18:41:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,040 INFO L225 Difference]: With dead ends: 82 [2021-12-06 18:41:52,040 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 18:41:52,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:52,042 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 18:41:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-06 18:41:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 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) [2021-12-06 18:41:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-06 18:41:52,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-06 18:41:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,051 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-06 18:41:52,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-06 18:41:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:41:52,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:41:52,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-06 18:41:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358371825] [2021-12-06 18:41:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358371825] [2021-12-06 18:41:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358371825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:52,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:52,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:41:52,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033772708] [2021-12-06 18:41:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:52,089 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,107 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-12-06 18:41:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 18:41:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,108 INFO L225 Difference]: With dead ends: 44 [2021-12-06 18:41:52,108 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 18:41:52,108 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 [2021-12-06 18:41:52,109 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 18:41:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-06 18:41:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-06 18:41:52,113 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2021-12-06 18:41:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,113 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-06 18:41:52,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-06 18:41:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:41:52,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:41:52,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-06 18:41:52,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108235045] [2021-12-06 18:41:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108235045] [2021-12-06 18:41:52,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108235045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:52,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:52,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:52,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766370317] [2021-12-06 18:41:52,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:52,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:52,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:52,161 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,210 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-06 18:41:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 18:41:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,211 INFO L225 Difference]: With dead ends: 77 [2021-12-06 18:41:52,211 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 18:41:52,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:52,212 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 18:41:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2021-12-06 18:41:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-06 18:41:52,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2021-12-06 18:41:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-06 18:41:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-06 18:41:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:41:52,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:41:52,217 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-06 18:41:52,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656537392] [2021-12-06 18:41:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656537392] [2021-12-06 18:41:52,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656537392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:52,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:52,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:52,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863536773] [2021-12-06 18:41:52,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:52,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:52,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:52,246 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,259 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-06 18:41:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-06 18:41:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,260 INFO L225 Difference]: With dead ends: 52 [2021-12-06 18:41:52,260 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:41:52,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:52,261 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:41:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-06 18:41:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-06 18:41:52,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2021-12-06 18:41:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,265 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-06 18:41:52,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-06 18:41:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:41:52,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:41:52,266 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-06 18:41:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409000137] [2021-12-06 18:41:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409000137] [2021-12-06 18:41:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409000137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:52,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:52,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:41:52,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624385417] [2021-12-06 18:41:52,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:41:52,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:41:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:41:52,288 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,302 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-06 18:41:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:41:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-06 18:41:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,303 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:41:52,303 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:41:52,303 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 [2021-12-06 18:41:52,304 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:41:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 18:41:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 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) [2021-12-06 18:41:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-06 18:41:52,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2021-12-06 18:41:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-06 18:41:52,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-06 18:41:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:41:52,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:41:52,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2021-12-06 18:41:52,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858405289] [2021-12-06 18:41:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858405289] [2021-12-06 18:41:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858405289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:52,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:52,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:52,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126555045] [2021-12-06 18:41:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:52,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:52,348 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,388 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-12-06 18:41:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-06 18:41:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,388 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:41:52,389 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 18:41:52,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:52,390 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 18:41:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-06 18:41:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-06 18:41:52,394 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-06 18:41:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,395 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-06 18:41:52,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-06 18:41:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:41:52,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,396 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:41:52,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-06 18:41:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:52,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844653839] [2021-12-06 18:41:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844653839] [2021-12-06 18:41:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844653839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109827220] [2021-12-06 18:41:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:52,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:52,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:52,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:41:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:52,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:41:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:41:52,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:41:52,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:41:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:52,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109827220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:52,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:52,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 18:41:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092242148] [2021-12-06 18:41:52,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:52,796 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:52,916 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-06 18:41:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:41:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 18:41:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:52,917 INFO L225 Difference]: With dead ends: 106 [2021-12-06 18:41:52,917 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 18:41:52,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:41:52,918 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:52,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 18:41:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2021-12-06 18:41:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-06 18:41:52,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2021-12-06 18:41:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:52,921 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-06 18:41:52,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-06 18:41:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:41:52,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:52,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:52,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:53,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:41:53,123 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2021-12-06 18:41:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616884452] [2021-12-06 18:41:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:53,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:53,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616884452] [2021-12-06 18:41:53,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616884452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:53,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:53,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142372018] [2021-12-06 18:41:53,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:53,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:53,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:53,168 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:53,183 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-12-06 18:41:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-06 18:41:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:53,184 INFO L225 Difference]: With dead ends: 42 [2021-12-06 18:41:53,184 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:41:53,184 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 [2021-12-06 18:41:53,185 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:53,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:41:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 18:41:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-06 18:41:53,189 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 14 [2021-12-06 18:41:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:53,189 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-06 18:41:53,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-06 18:41:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:41:53,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:53,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:53,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:41:53,190 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:53,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:53,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2021-12-06 18:41:53,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:53,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935822759] [2021-12-06 18:41:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:53,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:53,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935822759] [2021-12-06 18:41:53,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935822759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997511355] [2021-12-06 18:41:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:53,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:53,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:53,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:41:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:41:53,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:53,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:53,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997511355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:53,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:53,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-06 18:41:53,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344725836] [2021-12-06 18:41:53,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:53,297 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:53,309 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-06 18:41:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-06 18:41:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:53,310 INFO L225 Difference]: With dead ends: 71 [2021-12-06 18:41:53,310 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 18:41:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:53,311 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 106 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 18:41:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-12-06 18:41:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-12-06 18:41:53,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2021-12-06 18:41:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:53,315 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-12-06 18:41:53,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-12-06 18:41:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:41:53,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:53,316 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:53,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:41:53,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:41:53,518 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2021-12-06 18:41:53,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:53,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195989271] [2021-12-06 18:41:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:53,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:53,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195989271] [2021-12-06 18:41:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195989271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419832102] [2021-12-06 18:41:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:53,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:53,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:53,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:53,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:41:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:53,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:41:53,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:53,749 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:53,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:41:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:53,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:53,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419832102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:53,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:53,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 18:41:53,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134127448] [2021-12-06 18:41:53,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:53,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:41:53,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:41:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:53,940 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:54,022 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-06 18:41:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:41:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 18:41:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:54,023 INFO L225 Difference]: With dead ends: 73 [2021-12-06 18:41:54,023 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 18:41:54,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:41:54,024 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 116 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:54,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 123 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 18:41:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-06 18:41:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-12-06 18:41:54,026 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2021-12-06 18:41:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-12-06 18:41:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-12-06 18:41:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:41:54,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:54,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:54,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:41:54,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:41:54,229 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2021-12-06 18:41:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727007699] [2021-12-06 18:41:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:54,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:54,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727007699] [2021-12-06 18:41:54,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727007699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:54,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:54,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:54,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669518555] [2021-12-06 18:41:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:54,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:54,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:54,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:54,383 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:54,427 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-12-06 18:41:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 18:41:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:54,428 INFO L225 Difference]: With dead ends: 89 [2021-12-06 18:41:54,428 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 18:41:54,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:41:54,429 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:54,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 81 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 18:41:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-12-06 18:41:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-12-06 18:41:54,432 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2021-12-06 18:41:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:54,432 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-12-06 18:41:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-12-06 18:41:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:41:54,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:54,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:54,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:41:54,433 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2021-12-06 18:41:54,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:54,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962840938] [2021-12-06 18:41:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:54,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:54,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962840938] [2021-12-06 18:41:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962840938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82037475] [2021-12-06 18:41:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:54,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:54,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:54,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:41:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:41:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:54,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:54,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:41:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:54,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:54,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82037475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:54,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:54,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-06 18:41:54,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783999855] [2021-12-06 18:41:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:54,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:54,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:54,627 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:54,642 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-12-06 18:41:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 18:41:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:54,643 INFO L225 Difference]: With dead ends: 71 [2021-12-06 18:41:54,643 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 18:41:54,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:54,644 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:54,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 18:41:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-12-06 18:41:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-06 18:41:54,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2021-12-06 18:41:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:54,646 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-06 18:41:54,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-06 18:41:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:41:54,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:54,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:54,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:41:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:54,848 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2021-12-06 18:41:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:54,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403413477] [2021-12-06 18:41:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:54,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:54,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:54,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403413477] [2021-12-06 18:41:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403413477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:54,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:54,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:41:54,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849237411] [2021-12-06 18:41:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:41:54,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:41:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:41:54,928 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:55,007 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-12-06 18:41:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 18:41:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:55,008 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:41:55,008 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 18:41:55,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:55,009 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:55,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 18:41:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-06 18:41:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-06 18:41:55,012 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2021-12-06 18:41:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:55,013 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-06 18:41:55,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-06 18:41:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:41:55,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:55,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:55,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:41:55,014 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2021-12-06 18:41:55,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:55,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669459269] [2021-12-06 18:41:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:55,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669459269] [2021-12-06 18:41:55,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669459269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:55,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:55,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:55,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898329822] [2021-12-06 18:41:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:55,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:41:55,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:55,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:41:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:41:55,080 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:55,109 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-06 18:41:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 18:41:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:55,109 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:41:55,109 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:41:55,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:55,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:55,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:41:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-06 18:41:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-06 18:41:55,113 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2021-12-06 18:41:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:55,113 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-06 18:41:55,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-06 18:41:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:41:55,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:55,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:55,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:41:55,114 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2021-12-06 18:41:55,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:55,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635876322] [2021-12-06 18:41:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:55,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635876322] [2021-12-06 18:41:55,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635876322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367817129] [2021-12-06 18:41:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:55,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:55,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:55,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:41:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:41:55,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:55,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:41:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:41:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:41:55,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367817129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:55,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:41:55,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-06 18:41:55,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626125119] [2021-12-06 18:41:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:55,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:41:55,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:41:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:41:55,279 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:55,327 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-06 18:41:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:41:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:41:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:55,328 INFO L225 Difference]: With dead ends: 93 [2021-12-06 18:41:55,328 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 18:41:55,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:41:55,329 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:55,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 18:41:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2021-12-06 18:41:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.25) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-06 18:41:55,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 19 [2021-12-06 18:41:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:55,331 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-06 18:41:55,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-06 18:41:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:41:55,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:55,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:55,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:41:55,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:41:55,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2021-12-06 18:41:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:55,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222954400] [2021-12-06 18:41:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:55,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222954400] [2021-12-06 18:41:55,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222954400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285045734] [2021-12-06 18:41:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:55,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:55,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:55,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:55,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:41:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:41:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:55,733 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:41:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285045734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:55,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:55,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-12-06 18:41:55,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420571919] [2021-12-06 18:41:55,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:41:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:41:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:55,875 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:55,942 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-12-06 18:41:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:41:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:41:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:55,943 INFO L225 Difference]: With dead ends: 91 [2021-12-06 18:41:55,943 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:41:55,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:41:55,944 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:55,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 110 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:41:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-12-06 18:41:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-06 18:41:55,948 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 19 [2021-12-06 18:41:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:55,948 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-06 18:41:55,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-06 18:41:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:41:55,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:55,949 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] [2021-12-06 18:41:55,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:41:56,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:56,150 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2021-12-06 18:41:56,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120869716] [2021-12-06 18:41:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:56,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120869716] [2021-12-06 18:41:56,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120869716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:56,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:56,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:56,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509566284] [2021-12-06 18:41:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:56,184 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:56,207 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-12-06 18:41:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:41:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:56,209 INFO L225 Difference]: With dead ends: 75 [2021-12-06 18:41:56,209 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:41:56,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:56,210 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:56,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:41:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-06 18:41:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-12-06 18:41:56,214 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 20 [2021-12-06 18:41:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:56,214 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-12-06 18:41:56,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-12-06 18:41:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:41:56,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:56,215 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] [2021-12-06 18:41:56,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:41:56,215 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2021-12-06 18:41:56,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698731622] [2021-12-06 18:41:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:56,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698731622] [2021-12-06 18:41:56,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698731622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:56,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:56,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:41:56,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138509262] [2021-12-06 18:41:56,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:56,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:41:56,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:41:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:56,273 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:56,322 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-12-06 18:41:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:41:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:41:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:56,323 INFO L225 Difference]: With dead ends: 81 [2021-12-06 18:41:56,323 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 18:41:56,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:56,323 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:56,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 18:41:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-12-06 18:41:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-12-06 18:41:56,326 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2021-12-06 18:41:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:56,326 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-12-06 18:41:56,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-12-06 18:41:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:41:56,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:56,327 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] [2021-12-06 18:41:56,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:41:56,327 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2021-12-06 18:41:56,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726259538] [2021-12-06 18:41:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:56,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726259538] [2021-12-06 18:41:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726259538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:56,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:56,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:56,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436018730] [2021-12-06 18:41:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:56,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:56,358 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:56,391 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-06 18:41:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:41:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:41:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:56,392 INFO L225 Difference]: With dead ends: 76 [2021-12-06 18:41:56,392 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:41:56,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:41:56,393 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:56,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:41:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-06 18:41:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-06 18:41:56,397 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 21 [2021-12-06 18:41:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:56,397 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-06 18:41:56,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-06 18:41:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:41:56,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:56,398 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] [2021-12-06 18:41:56,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:41:56,398 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2021-12-06 18:41:56,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656481790] [2021-12-06 18:41:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:56,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656481790] [2021-12-06 18:41:56,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656481790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:56,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:56,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:41:56,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107774387] [2021-12-06 18:41:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:56,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:41:56,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:41:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:41:56,449 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:56,496 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-06 18:41:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:41:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:41:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:56,497 INFO L225 Difference]: With dead ends: 80 [2021-12-06 18:41:56,497 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 18:41:56,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:56,498 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:56,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 18:41:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-06 18:41:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-12-06 18:41:56,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 21 [2021-12-06 18:41:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:56,501 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-12-06 18:41:56,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-12-06 18:41:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:41:56,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:56,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:56,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:41:56,502 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2021-12-06 18:41:56,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408947306] [2021-12-06 18:41:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:41:56,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408947306] [2021-12-06 18:41:56,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408947306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:56,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:56,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:41:56,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827185040] [2021-12-06 18:41:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:56,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:56,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:56,589 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:56,707 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-06 18:41:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:41:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:41:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:56,708 INFO L225 Difference]: With dead ends: 102 [2021-12-06 18:41:56,708 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 18:41:56,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:41:56,709 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 120 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 148 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 18:41:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-12-06 18:41:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-12-06 18:41:56,712 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 21 [2021-12-06 18:41:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:56,712 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-12-06 18:41:56,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-12-06 18:41:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:41:56,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:56,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:56,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:41:56,713 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2021-12-06 18:41:56,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:56,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099286683] [2021-12-06 18:41:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:56,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099286683] [2021-12-06 18:41:56,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099286683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632973069] [2021-12-06 18:41:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:56,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:56,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:56,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:41:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:41:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:56,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:41:57,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:41:57,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:41:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 18:41:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:57,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 18:41:57,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 18:41:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632973069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:57,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:57,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2021-12-06 18:41:57,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290548217] [2021-12-06 18:41:57,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:41:57,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:41:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:41:57,294 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:57,504 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-06 18:41:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:41:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:41:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:57,505 INFO L225 Difference]: With dead ends: 95 [2021-12-06 18:41:57,505 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 18:41:57,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:41:57,506 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:57,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 250 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 140 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-12-06 18:41:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 18:41:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-12-06 18:41:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-06 18:41:57,510 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 21 [2021-12-06 18:41:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-06 18:41:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-06 18:41:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:41:57,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:57,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:57,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:41:57,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:41:57,711 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2021-12-06 18:41:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:57,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822967721] [2021-12-06 18:41:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:57,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:57,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:57,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822967721] [2021-12-06 18:41:57,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822967721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:57,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:57,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:41:57,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119707356] [2021-12-06 18:41:57,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:57,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:41:57,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:41:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:57,831 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:58,006 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-12-06 18:41:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:41:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:58,007 INFO L225 Difference]: With dead ends: 136 [2021-12-06 18:41:58,007 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 18:41:58,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:41:58,008 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:58,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 18:41:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2021-12-06 18:41:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.2) internal successors, (132), 113 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2021-12-06 18:41:58,011 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 24 [2021-12-06 18:41:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:58,011 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2021-12-06 18:41:58,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2021-12-06 18:41:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:41:58,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:58,011 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:58,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 18:41:58,012 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2021-12-06 18:41:58,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630872024] [2021-12-06 18:41:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:58,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:58,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630872024] [2021-12-06 18:41:58,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630872024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:58,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:58,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:41:58,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663007557] [2021-12-06 18:41:58,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:58,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:41:58,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:41:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:41:58,094 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:58,205 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2021-12-06 18:41:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:41:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:41:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:58,206 INFO L225 Difference]: With dead ends: 136 [2021-12-06 18:41:58,206 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 18:41:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:41:58,207 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:58,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 186 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 18:41:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2021-12-06 18:41:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-12-06 18:41:58,209 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 24 [2021-12-06 18:41:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:58,210 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-12-06 18:41:58,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-12-06 18:41:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:41:58,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:58,210 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:58,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 18:41:58,210 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2021-12-06 18:41:58,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:58,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791262413] [2021-12-06 18:41:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:58,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:58,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791262413] [2021-12-06 18:41:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791262413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:58,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:58,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:41:58,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688078277] [2021-12-06 18:41:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:58,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:41:58,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:41:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:41:58,285 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:58,350 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2021-12-06 18:41:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:41:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:41:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:58,351 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:41:58,351 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 18:41:58,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:41:58,352 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:58,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 140 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 18:41:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2021-12-06 18:41:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.238532110091743) internal successors, (135), 112 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-12-06 18:41:58,354 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 24 [2021-12-06 18:41:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:58,355 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-12-06 18:41:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-12-06 18:41:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:41:58,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:58,355 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] [2021-12-06 18:41:58,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 18:41:58,355 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:58,355 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2021-12-06 18:41:58,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396075447] [2021-12-06 18:41:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:58,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:41:58,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:58,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396075447] [2021-12-06 18:41:58,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396075447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:41:58,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:41:58,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:41:58,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329492944] [2021-12-06 18:41:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:41:58,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:41:58,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:41:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:58,420 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:58,435 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2021-12-06 18:41:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:41:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:41:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:58,436 INFO L225 Difference]: With dead ends: 112 [2021-12-06 18:41:58,436 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 18:41:58,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:41:58,437 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:58,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:41:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 18:41:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-06 18:41:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.2) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-12-06 18:41:58,439 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 25 [2021-12-06 18:41:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:58,439 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-12-06 18:41:58,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-12-06 18:41:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:41:58,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:58,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 18:41:58,440 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2021-12-06 18:41:58,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746827396] [2021-12-06 18:41:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:58,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:58,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746827396] [2021-12-06 18:41:58,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746827396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158477512] [2021-12-06 18:41:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:41:58,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:58,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:58,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:41:58,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:41:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:41:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:41:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:58,582 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:58,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:41:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:58,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158477512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:58,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:58,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-06 18:41:58,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136033412] [2021-12-06 18:41:58,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:41:58,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:41:58,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:41:58,880 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:41:59,058 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-12-06 18:41:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:41:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 18:41:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:41:59,059 INFO L225 Difference]: With dead ends: 122 [2021-12-06 18:41:59,059 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 18:41:59,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:41:59,060 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:41:59,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 188 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:41:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 18:41:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-12-06 18:41:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-06 18:41:59,062 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 25 [2021-12-06 18:41:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:41:59,062 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-06 18:41:59,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:41:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-06 18:41:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:41:59,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:41:59,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:41:59,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:41:59,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:59,263 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:41:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:41:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -67455619, now seen corresponding path program 1 times [2021-12-06 18:41:59,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:41:59,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376383132] [2021-12-06 18:41:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:59,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:41:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:59,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:41:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376383132] [2021-12-06 18:41:59,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376383132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:41:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059221065] [2021-12-06 18:41:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:41:59,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:41:59,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:41:59,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:41:59,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:41:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:41:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:41:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:41:59,401 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:41:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:41:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:59,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:41:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:41:59,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059221065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:41:59,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:41:59,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-06 18:41:59,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892154372] [2021-12-06 18:41:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:41:59,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:41:59,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:41:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:41:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:41:59,715 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:00,064 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2021-12-06 18:42:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:42:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 18:42:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:00,065 INFO L225 Difference]: With dead ends: 125 [2021-12-06 18:42:00,065 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 18:42:00,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:42:00,066 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 254 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:00,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 111 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 18:42:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-12-06 18:42:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 100 states have (on average 1.19) internal successors, (119), 102 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) [2021-12-06 18:42:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2021-12-06 18:42:00,069 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 27 [2021-12-06 18:42:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:00,069 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2021-12-06 18:42:00,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2021-12-06 18:42:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:42:00,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:00,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:00,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:42:00,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:00,270 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 3 times [2021-12-06 18:42:00,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:00,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158734000] [2021-12-06 18:42:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:00,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:00,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158734000] [2021-12-06 18:42:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158734000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000024475] [2021-12-06 18:42:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:00,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:00,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:00,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:42:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:42:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:42:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:00,817 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-06 18:42:00,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2021-12-06 18:42:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:00,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:00,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:42:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 18:42:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:01,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000024475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:01,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:01,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-12-06 18:42:01,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394493300] [2021-12-06 18:42:01,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:01,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:42:01,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:42:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:42:01,147 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:01,537 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-12-06 18:42:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:42:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 18:42:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:01,538 INFO L225 Difference]: With dead ends: 143 [2021-12-06 18:42:01,538 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 18:42:01,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1719, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:42:01,539 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:01,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 156 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-12-06 18:42:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 18:42:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-12-06 18:42:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 115 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-12-06 18:42:01,541 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 27 [2021-12-06 18:42:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-12-06 18:42:01,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-12-06 18:42:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:42:01,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:01,542 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:42:01,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:42:01,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:42:01,743 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2021-12-06 18:42:01,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:01,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310673660] [2021-12-06 18:42:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:01,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:42:01,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310673660] [2021-12-06 18:42:01,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310673660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278505096] [2021-12-06 18:42:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:01,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:01,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:01,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:42:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:42:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:42:01,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:42:01,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278505096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:01,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-06 18:42:01,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657387456] [2021-12-06 18:42:01,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:01,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:42:01,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:42:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:42:01,936 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:02,019 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2021-12-06 18:42:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:42:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 18:42:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:02,020 INFO L225 Difference]: With dead ends: 123 [2021-12-06 18:42:02,020 INFO L226 Difference]: Without dead ends: 123 [2021-12-06 18:42:02,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:42:02,020 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:02,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:42:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-06 18:42:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2021-12-06 18:42:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-06 18:42:02,023 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 28 [2021-12-06 18:42:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:02,023 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-06 18:42:02,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-06 18:42:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:42:02,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:02,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:02,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:42:02,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:02,225 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 4 times [2021-12-06 18:42:02,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:02,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257841120] [2021-12-06 18:42:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:02,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:02,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257841120] [2021-12-06 18:42:02,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257841120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571091914] [2021-12-06 18:42:02,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:02,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:02,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:02,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:42:02,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:02,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:02,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 18:42:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:02,412 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:02,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:02,657 INFO L354 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2021-12-06 18:42:02,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2021-12-06 18:42:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:42:02,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:02,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:42:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:02,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 18:42:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:42:03,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571091914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:03,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:03,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2021-12-06 18:42:03,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681897182] [2021-12-06 18:42:03,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:42:03,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:42:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:42:03,217 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:03,743 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-12-06 18:42:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:42:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:42:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:03,744 INFO L225 Difference]: With dead ends: 153 [2021-12-06 18:42:03,744 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 18:42:03,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:42:03,746 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:03,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 315 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 590 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2021-12-06 18:42:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 18:42:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-12-06 18:42:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2021-12-06 18:42:03,749 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 31 [2021-12-06 18:42:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2021-12-06 18:42:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2021-12-06 18:42:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 18:42:03,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:03,750 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:42:03,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:03,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:03,952 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2021-12-06 18:42:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:03,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654272985] [2021-12-06 18:42:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:03,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:42:04,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654272985] [2021-12-06 18:42:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654272985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568105731] [2021-12-06 18:42:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:04,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:04,066 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:04,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:42:04,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:04,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:42:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:42:04,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:04,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:42:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:42:04,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568105731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:04,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:04,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-06 18:42:04,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491591189] [2021-12-06 18:42:04,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:04,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:42:04,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:42:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:42:04,281 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:04,434 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2021-12-06 18:42:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:42:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 18:42:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:04,435 INFO L225 Difference]: With dead ends: 140 [2021-12-06 18:42:04,435 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 18:42:04,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:42:04,439 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:04,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 244 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 18:42:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2021-12-06 18:42:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-12-06 18:42:04,441 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2021-12-06 18:42:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:04,442 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-12-06 18:42:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-12-06 18:42:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:42:04,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:04,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:04,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:42:04,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:42:04,643 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1626154062, now seen corresponding path program 5 times [2021-12-06 18:42:04,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:04,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130312295] [2021-12-06 18:42:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:04,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:04,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130312295] [2021-12-06 18:42:04,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130312295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692259684] [2021-12-06 18:42:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:42:04,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:04,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:04,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:42:04,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 18:42:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:42:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:04,843 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:04,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:05,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:05,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692259684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:05,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:05,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2021-12-06 18:42:05,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436006467] [2021-12-06 18:42:05,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:05,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:42:05,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:42:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:42:05,168 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:05,570 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2021-12-06 18:42:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:42:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 18:42:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:05,571 INFO L225 Difference]: With dead ends: 251 [2021-12-06 18:42:05,571 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 18:42:05,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:42:05,572 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:05,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 242 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:42:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 18:42:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2021-12-06 18:42:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-12-06 18:42:05,576 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 35 [2021-12-06 18:42:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:05,577 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-12-06 18:42:05,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-12-06 18:42:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 18:42:05,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:05,578 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:42:05,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:42:05,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 18:42:05,778 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2021-12-06 18:42:05,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:05,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038302280] [2021-12-06 18:42:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:05,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:42:05,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:05,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038302280] [2021-12-06 18:42:05,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038302280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60712148] [2021-12-06 18:42:05,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:05,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:05,933 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:05,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:42:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:42:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 18:42:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:06,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:06,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-06 18:42:06,383 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 18:42:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 18:42:06,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:06,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:06,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-12-06 18:42:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:06,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:06,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:06,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2021-12-06 18:42:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:06,576 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) (= 0 |c_ULTIMATE.start_cstrcat_#t~mem6#1|)) is different from false [2021-12-06 18:42:06,582 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0)) is different from false [2021-12-06 18:42:06,587 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-06 18:42:06,597 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-06 18:42:06,604 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length3~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0))) is different from false [2021-12-06 18:42:06,615 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-06 18:42:06,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2021-12-06 18:42:06,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:06,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:06,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-12-06 18:42:06,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:42:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 18:42:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60712148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:06,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2021-12-06 18:42:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367335948] [2021-12-06 18:42:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:06,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:42:06,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:42:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1253, Unknown=5, NotChecked=380, Total=1806 [2021-12-06 18:42:06,953 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:08,183 INFO L93 Difference]: Finished difference Result 290 states and 325 transitions. [2021-12-06 18:42:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 18:42:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 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 36 [2021-12-06 18:42:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:08,184 INFO L225 Difference]: With dead ends: 290 [2021-12-06 18:42:08,184 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 18:42:08,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=753, Invalid=5422, Unknown=7, NotChecked=790, Total=6972 [2021-12-06 18:42:08,186 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 344 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:08,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 343 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 457 Invalid, 0 Unknown, 584 Unchecked, 0.2s Time] [2021-12-06 18:42:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 18:42:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 210. [2021-12-06 18:42:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 207 states have (on average 1.1497584541062802) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2021-12-06 18:42:08,189 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 36 [2021-12-06 18:42:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:08,190 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2021-12-06 18:42:08,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2021-12-06 18:42:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 18:42:08,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:08,190 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:08,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:42:08,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 18:42:08,391 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 634400591, now seen corresponding path program 6 times [2021-12-06 18:42:08,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712745484] [2021-12-06 18:42:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:08,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:08,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712745484] [2021-12-06 18:42:08,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712745484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936316429] [2021-12-06 18:42:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:42:08,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:08,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:08,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:42:08,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:42:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:42:08,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:09,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:10,900 INFO L354 Elim1Store]: treesize reduction 101, result has 13.7 percent of original size [2021-12-06 18:42:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2021-12-06 18:42:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 31 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:10,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:11,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2021-12-06 18:42:11,009 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-06 18:42:11,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 81 [2021-12-06 18:42:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:11,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936316429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:11,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:11,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2021-12-06 18:42:11,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002249138] [2021-12-06 18:42:11,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:11,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:42:11,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:42:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1741, Unknown=3, NotChecked=0, Total=1980 [2021-12-06 18:42:11,261 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:16,416 INFO L93 Difference]: Finished difference Result 362 states and 401 transitions. [2021-12-06 18:42:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 18:42:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 18:42:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:16,418 INFO L225 Difference]: With dead ends: 362 [2021-12-06 18:42:16,418 INFO L226 Difference]: Without dead ends: 351 [2021-12-06 18:42:16,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1174, Invalid=5137, Unknown=9, NotChecked=0, Total=6320 [2021-12-06 18:42:16,420 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 443 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:16,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 449 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 591 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2021-12-06 18:42:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-06 18:42:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 222. [2021-12-06 18:42:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 219 states have (on average 1.1506849315068493) internal successors, (252), 221 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2021-12-06 18:42:16,425 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 39 [2021-12-06 18:42:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2021-12-06 18:42:16,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2021-12-06 18:42:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:42:16,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:16,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:16,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:16,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 18:42:16,627 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 1 times [2021-12-06 18:42:16,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:16,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538351055] [2021-12-06 18:42:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:16,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:16,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538351055] [2021-12-06 18:42:16,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538351055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181756306] [2021-12-06 18:42:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:16,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:16,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:16,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:42:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:16,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 18:42:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:16,848 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:16,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:17,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:17,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181756306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:17,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:17,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2021-12-06 18:42:17,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975492146] [2021-12-06 18:42:17,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:17,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:42:17,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:17,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:42:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:42:17,279 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:17,726 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2021-12-06 18:42:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:42:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 18:42:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:17,727 INFO L225 Difference]: With dead ends: 263 [2021-12-06 18:42:17,727 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 18:42:17,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:42:17,728 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 206 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:17,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 310 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:42:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 18:42:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2021-12-06 18:42:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 231 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 261 transitions. [2021-12-06 18:42:17,732 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 261 transitions. Word has length 41 [2021-12-06 18:42:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:17,733 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 261 transitions. [2021-12-06 18:42:17,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 261 transitions. [2021-12-06 18:42:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:42:17,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:17,733 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-06 18:42:17,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:42:17,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:42:17,934 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash 541424533, now seen corresponding path program 1 times [2021-12-06 18:42:17,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:17,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818162084] [2021-12-06 18:42:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:17,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:42:17,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:17,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818162084] [2021-12-06 18:42:17,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818162084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435166175] [2021-12-06 18:42:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:17,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:17,990 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:17,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:42:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:42:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:42:18,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:42:18,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435166175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:18,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:18,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-06 18:42:18,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470652943] [2021-12-06 18:42:18,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:18,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:42:18,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:42:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:42:18,186 INFO L87 Difference]: Start difference. First operand 232 states and 261 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:18,321 INFO L93 Difference]: Finished difference Result 231 states and 256 transitions. [2021-12-06 18:42:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:42:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 18:42:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:18,323 INFO L225 Difference]: With dead ends: 231 [2021-12-06 18:42:18,323 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 18:42:18,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:42:18,324 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 186 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:18,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 184 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 18:42:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-12-06 18:42:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2021-12-06 18:42:18,329 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 42 [2021-12-06 18:42:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:18,329 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2021-12-06 18:42:18,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2021-12-06 18:42:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:42:18,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:18,330 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:18,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:18,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:18,531 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1605342100, now seen corresponding path program 7 times [2021-12-06 18:42:18,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776308099] [2021-12-06 18:42:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:18,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:18,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776308099] [2021-12-06 18:42:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776308099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514184780] [2021-12-06 18:42:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:42:18,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:18,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:18,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:42:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:42:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:18,759 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:19,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:19,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514184780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:19,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:19,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2021-12-06 18:42:19,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050398092] [2021-12-06 18:42:19,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:19,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:42:19,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:42:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 18:42:19,313 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 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) [2021-12-06 18:42:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:19,742 INFO L93 Difference]: Finished difference Result 401 states and 440 transitions. [2021-12-06 18:42:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:42:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 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 43 [2021-12-06 18:42:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:19,744 INFO L225 Difference]: With dead ends: 401 [2021-12-06 18:42:19,744 INFO L226 Difference]: Without dead ends: 401 [2021-12-06 18:42:19,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:42:19,745 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 279 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:19,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 458 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:42:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-06 18:42:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 231. [2021-12-06 18:42:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.144736842105263) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2021-12-06 18:42:19,749 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 43 [2021-12-06 18:42:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:19,749 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2021-12-06 18:42:19,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 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) [2021-12-06 18:42:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2021-12-06 18:42:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:42:19,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:19,750 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:19,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:19,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 18:42:19,951 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1392056413, now seen corresponding path program 2 times [2021-12-06 18:42:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060089569] [2021-12-06 18:42:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:19,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:42:20,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060089569] [2021-12-06 18:42:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060089569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022421731] [2021-12-06 18:42:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:20,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:20,206 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:20,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:42:20,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:20,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:42:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:20,631 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-06 18:42:20,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2021-12-06 18:42:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:42:20,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:20,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:42:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 18:42:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:42:20,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022421731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:20,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:20,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2021-12-06 18:42:20,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490932355] [2021-12-06 18:42:20,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:20,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:42:20,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:42:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:42:20,975 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:21,440 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2021-12-06 18:42:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:42:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 18:42:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:21,441 INFO L225 Difference]: With dead ends: 257 [2021-12-06 18:42:21,441 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 18:42:21,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:42:21,442 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 194 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:21,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 192 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 294 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-12-06 18:42:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 18:42:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2021-12-06 18:42:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2021-12-06 18:42:21,445 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 43 [2021-12-06 18:42:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2021-12-06 18:42:21,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2021-12-06 18:42:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:42:21,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:21,446 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:42:21,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:42:21,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:21,647 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash -701284269, now seen corresponding path program 4 times [2021-12-06 18:42:21,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:21,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927631204] [2021-12-06 18:42:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:21,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:42:21,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927631204] [2021-12-06 18:42:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927631204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578903465] [2021-12-06 18:42:21,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:21,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:21,752 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:21,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:42:21,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 18:42:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:21,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:21,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:42:21,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:42:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:42:21,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:42:22,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:22,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 18:42:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:42:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:22,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:22,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 18:42:22,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:22,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 18:42:22,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:42:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:42:22,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578903465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:22,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:22,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-12-06 18:42:22,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128606076] [2021-12-06 18:42:22,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:22,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:42:22,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:22,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:42:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=715, Unknown=10, NotChecked=0, Total=812 [2021-12-06 18:42:22,714 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:23,434 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2021-12-06 18:42:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:42:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 18:42:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:23,435 INFO L225 Difference]: With dead ends: 246 [2021-12-06 18:42:23,435 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 18:42:23,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=450, Invalid=2192, Unknown=10, NotChecked=0, Total=2652 [2021-12-06 18:42:23,437 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:23,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 417 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 423 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-12-06 18:42:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 18:42:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 219. [2021-12-06 18:42:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 217 states have (on average 1.1382488479262673) internal successors, (247), 218 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 247 transitions. [2021-12-06 18:42:23,440 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 247 transitions. Word has length 44 [2021-12-06 18:42:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:23,441 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 247 transitions. [2021-12-06 18:42:23,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 247 transitions. [2021-12-06 18:42:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:42:23,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:23,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:23,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:42:23,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:23,642 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -840498235, now seen corresponding path program 8 times [2021-12-06 18:42:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434560729] [2021-12-06 18:42:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:23,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:24,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:24,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434560729] [2021-12-06 18:42:24,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434560729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:24,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927539461] [2021-12-06 18:42:24,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:42:24,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:24,242 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:24,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:42:24,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:42:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:42:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:24,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:25,198 INFO L354 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2021-12-06 18:42:25,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 53 [2021-12-06 18:42:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2021-12-06 18:42:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2021-12-06 18:42:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:25,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927539461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:25,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:25,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 55 [2021-12-06 18:42:25,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078784970] [2021-12-06 18:42:25,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:25,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:42:25,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:42:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 18:42:25,888 INFO L87 Difference]: Start difference. First operand 219 states and 247 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:27,063 INFO L93 Difference]: Finished difference Result 309 states and 347 transitions. [2021-12-06 18:42:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:42:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 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 45 [2021-12-06 18:42:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:27,065 INFO L225 Difference]: With dead ends: 309 [2021-12-06 18:42:27,065 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 18:42:27,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=878, Invalid=4822, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:42:27,067 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:27,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 288 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 421 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-12-06 18:42:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 18:42:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 253. [2021-12-06 18:42:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.1474103585657371) internal successors, (288), 252 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 288 transitions. [2021-12-06 18:42:27,070 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 288 transitions. Word has length 45 [2021-12-06 18:42:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:27,070 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 288 transitions. [2021-12-06 18:42:27,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 288 transitions. [2021-12-06 18:42:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 18:42:27,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:27,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:27,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:27,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 18:42:27,272 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2021-12-06 18:42:27,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357789994] [2021-12-06 18:42:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:27,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:27,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357789994] [2021-12-06 18:42:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357789994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710648138] [2021-12-06 18:42:27,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:27,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:27,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:27,385 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:27,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:42:27,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 18:42:27,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 18:42:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:42:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:27,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:42:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:29,780 INFO L354 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2021-12-06 18:42:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2021-12-06 18:42:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 18:42:30,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-06 18:42:30,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:30,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-12-06 18:42:30,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 18:42:30,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710648138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:30,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:30,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2021-12-06 18:42:30,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814673778] [2021-12-06 18:42:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:42:30,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:42:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1475, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 18:42:30,941 INFO L87 Difference]: Start difference. First operand 253 states and 288 transitions. Second operand has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:32,317 INFO L93 Difference]: Finished difference Result 319 states and 353 transitions. [2021-12-06 18:42:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:42:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 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 47 [2021-12-06 18:42:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:32,319 INFO L225 Difference]: With dead ends: 319 [2021-12-06 18:42:32,319 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 18:42:32,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=560, Invalid=5139, Unknown=1, NotChecked=0, Total=5700 [2021-12-06 18:42:32,320 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:32,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 385 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 711 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2021-12-06 18:42:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 18:42:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 231. [2021-12-06 18:42:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2021-12-06 18:42:32,324 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 47 [2021-12-06 18:42:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:32,324 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2021-12-06 18:42:32,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2021-12-06 18:42:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:42:32,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:32,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:32,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 18:42:32,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 18:42:32,526 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1117402914, now seen corresponding path program 9 times [2021-12-06 18:42:32,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:32,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005407366] [2021-12-06 18:42:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:32,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:32,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005407366] [2021-12-06 18:42:32,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005407366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033867922] [2021-12-06 18:42:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:42:32,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:32,716 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:32,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:42:32,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:42:32,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:32,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:42:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:32,824 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:32,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:33,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033867922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:33,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:33,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2021-12-06 18:42:33,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910801119] [2021-12-06 18:42:33,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:33,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:42:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:42:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:42:33,506 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:34,118 INFO L93 Difference]: Finished difference Result 377 states and 414 transitions. [2021-12-06 18:42:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:42:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 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 49 [2021-12-06 18:42:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:34,120 INFO L225 Difference]: With dead ends: 377 [2021-12-06 18:42:34,120 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 18:42:34,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=845, Invalid=3187, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 18:42:34,121 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 402 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:34,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 386 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:42:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 18:42:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 237. [2021-12-06 18:42:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.1446808510638298) internal successors, (269), 236 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 269 transitions. [2021-12-06 18:42:34,125 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 269 transitions. Word has length 49 [2021-12-06 18:42:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:34,125 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 269 transitions. [2021-12-06 18:42:34,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 269 transitions. [2021-12-06 18:42:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:42:34,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:34,126 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:34,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:42:34,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 18:42:34,327 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash 82376955, now seen corresponding path program 10 times [2021-12-06 18:42:34,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318496973] [2021-12-06 18:42:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:34,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:34,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318496973] [2021-12-06 18:42:34,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318496973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102282056] [2021-12-06 18:42:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:34,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:34,998 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:42:35,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 18:42:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:35,077 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:35,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:35,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:42:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:36,138 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-12-06 18:42:36,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 65 [2021-12-06 18:42:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-12-06 18:42:36,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2021-12-06 18:42:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 43 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102282056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:37,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:37,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 73 [2021-12-06 18:42:37,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965110461] [2021-12-06 18:42:37,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:37,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 18:42:37,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 18:42:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=4754, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 18:42:37,697 INFO L87 Difference]: Start difference. First operand 237 states and 269 transitions. Second operand has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:41,341 INFO L93 Difference]: Finished difference Result 424 states and 467 transitions. [2021-12-06 18:42:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:42:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 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 51 [2021-12-06 18:42:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:41,342 INFO L225 Difference]: With dead ends: 424 [2021-12-06 18:42:41,342 INFO L226 Difference]: Without dead ends: 409 [2021-12-06 18:42:41,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1804, Invalid=11306, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 18:42:41,344 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 564 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:41,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 433 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 864 Invalid, 0 Unknown, 132 Unchecked, 0.5s Time] [2021-12-06 18:42:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-06 18:42:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 279. [2021-12-06 18:42:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.148014440433213) internal successors, (318), 278 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2021-12-06 18:42:41,348 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 51 [2021-12-06 18:42:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:41,348 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2021-12-06 18:42:41,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2021-12-06 18:42:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:42:41,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:41,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:41,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:42:41,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 18:42:41,550 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1816113278, now seen corresponding path program 4 times [2021-12-06 18:42:41,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:41,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963712705] [2021-12-06 18:42:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:41,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:42:41,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963712705] [2021-12-06 18:42:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963712705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247277236] [2021-12-06 18:42:41,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:42:41,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:41,650 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:41,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:42:41,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:42:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 18:42:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:42:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:42:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:42:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:42:41,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:42:42,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247277236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:42,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:42,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-12-06 18:42:42,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982152198] [2021-12-06 18:42:42,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:42,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:42:42,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:42:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:42:42,047 INFO L87 Difference]: Start difference. First operand 279 states and 318 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:42,408 INFO L93 Difference]: Finished difference Result 456 states and 518 transitions. [2021-12-06 18:42:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:42:42,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 18:42:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:42,410 INFO L225 Difference]: With dead ends: 456 [2021-12-06 18:42:42,410 INFO L226 Difference]: Without dead ends: 393 [2021-12-06 18:42:42,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:42:42,411 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 273 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:42,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 166 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-06 18:42:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 374. [2021-12-06 18:42:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 372 states have (on average 1.1370967741935485) internal successors, (423), 373 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 423 transitions. [2021-12-06 18:42:42,418 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 423 transitions. Word has length 51 [2021-12-06 18:42:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:42,418 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 423 transitions. [2021-12-06 18:42:42,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 423 transitions. [2021-12-06 18:42:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:42:42,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:42,420 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:42,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:42:42,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:42,620 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -53644648, now seen corresponding path program 11 times [2021-12-06 18:42:42,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:42,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505084889] [2021-12-06 18:42:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:42,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:42,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505084889] [2021-12-06 18:42:42,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505084889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406452456] [2021-12-06 18:42:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:42:42,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:42,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:42,814 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:42,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:42:42,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 18:42:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 18:42:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:42,918 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:42:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:43,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:42:43,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406452456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:43,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:43,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2021-12-06 18:42:43,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219827018] [2021-12-06 18:42:43,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:43,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:42:43,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:42:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:42:43,751 INFO L87 Difference]: Start difference. First operand 374 states and 423 transitions. Second operand has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:44,425 INFO L93 Difference]: Finished difference Result 613 states and 674 transitions. [2021-12-06 18:42:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:42:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 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 55 [2021-12-06 18:42:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:44,428 INFO L225 Difference]: With dead ends: 613 [2021-12-06 18:42:44,428 INFO L226 Difference]: Without dead ends: 613 [2021-12-06 18:42:44,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=901, Invalid=3521, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:42:44,429 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 297 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:44,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 628 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:42:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-06 18:42:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 382. [2021-12-06 18:42:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.1421052631578947) internal successors, (434), 381 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 434 transitions. [2021-12-06 18:42:44,434 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 434 transitions. Word has length 55 [2021-12-06 18:42:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:44,434 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 434 transitions. [2021-12-06 18:42:44,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 434 transitions. [2021-12-06 18:42:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:42:44,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:44,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:44,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:42:44,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:44,637 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1991873627, now seen corresponding path program 5 times [2021-12-06 18:42:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:44,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920651436] [2021-12-06 18:42:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:44,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:42:44,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920651436] [2021-12-06 18:42:44,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920651436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637574121] [2021-12-06 18:42:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:42:44,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:44,740 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:44,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:42:44,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:42:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:42:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:42:44,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:42:45,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637574121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:45,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:45,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-06 18:42:45,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797877337] [2021-12-06 18:42:45,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:45,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:42:45,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:42:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:42:45,050 INFO L87 Difference]: Start difference. First operand 382 states and 434 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:45,220 INFO L93 Difference]: Finished difference Result 396 states and 441 transitions. [2021-12-06 18:42:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:42:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 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 55 [2021-12-06 18:42:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:45,222 INFO L225 Difference]: With dead ends: 396 [2021-12-06 18:42:45,222 INFO L226 Difference]: Without dead ends: 396 [2021-12-06 18:42:45,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:42:45,222 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 333 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:45,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 179 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:42:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-06 18:42:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 381. [2021-12-06 18:42:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 379 states have (on average 1.1372031662269129) internal successors, (431), 380 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 431 transitions. [2021-12-06 18:42:45,228 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 431 transitions. Word has length 55 [2021-12-06 18:42:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:45,228 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 431 transitions. [2021-12-06 18:42:45,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 431 transitions. [2021-12-06 18:42:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:42:45,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:45,229 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:45,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:42:45,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 18:42:45,430 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash -12898575, now seen corresponding path program 12 times [2021-12-06 18:42:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791616056] [2021-12-06 18:42:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:45,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 51 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:46,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791616056] [2021-12-06 18:42:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791616056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358324186] [2021-12-06 18:42:46,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:42:46,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:46,382 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:46,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:42:46,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 18:42:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 18:42:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:47,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 31 [2021-12-06 18:42:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:47,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2021-12-06 18:42:47,750 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-12-06 18:42:47,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 170 treesize of output 144 [2021-12-06 18:42:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:48,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358324186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:48,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:48,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 67 [2021-12-06 18:42:48,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282932815] [2021-12-06 18:42:48,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:48,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 18:42:48,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 18:42:48,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=3916, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:42:48,556 INFO L87 Difference]: Start difference. First operand 381 states and 431 transitions. Second operand has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 67 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:57,358 INFO L93 Difference]: Finished difference Result 782 states and 851 transitions. [2021-12-06 18:42:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 18:42:57,358 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 67 states have internal predecessors, (144), 0 states have call successors, (0), 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 57 [2021-12-06 18:42:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:57,361 INFO L225 Difference]: With dead ends: 782 [2021-12-06 18:42:57,361 INFO L226 Difference]: Without dead ends: 748 [2021-12-06 18:42:57,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11591 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=5056, Invalid=29354, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 18:42:57,363 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 950 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:57,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 497 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:42:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-06 18:42:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 442. [2021-12-06 18:42:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.1454545454545455) internal successors, (504), 441 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 504 transitions. [2021-12-06 18:42:57,371 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 504 transitions. Word has length 57 [2021-12-06 18:42:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 504 transitions. [2021-12-06 18:42:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 67 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 504 transitions. [2021-12-06 18:42:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:42:57,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:57,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:57,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 18:42:57,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 18:42:57,573 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1089586808, now seen corresponding path program 6 times [2021-12-06 18:42:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080792791] [2021-12-06 18:42:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:57,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:42:57,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:57,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080792791] [2021-12-06 18:42:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080792791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:57,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43430415] [2021-12-06 18:42:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:42:57,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:57,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:57,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:42:57,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:42:57,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:42:57,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 18:42:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:58,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:42:58,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:42:58,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:42:58,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-06 18:42:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:42:58,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:42:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 18:42:58,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 18:42:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:42:58,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43430415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:42:58,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:42:58,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 38 [2021-12-06 18:42:58,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902070091] [2021-12-06 18:42:58,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:42:58,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 18:42:58,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:42:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 18:42:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:42:58,478 INFO L87 Difference]: Start difference. First operand 442 states and 504 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2021-12-06 18:42:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:42:59,439 INFO L93 Difference]: Finished difference Result 462 states and 522 transitions. [2021-12-06 18:42:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:42:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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 59 [2021-12-06 18:42:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:42:59,441 INFO L225 Difference]: With dead ends: 462 [2021-12-06 18:42:59,441 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 18:42:59,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:42:59,442 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 291 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:42:59,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 476 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1126 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2021-12-06 18:42:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 18:42:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 435. [2021-12-06 18:42:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 433 states have (on average 1.1408775981524248) internal successors, (494), 434 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:42:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 494 transitions. [2021-12-06 18:42:59,448 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 494 transitions. Word has length 59 [2021-12-06 18:42:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:42:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 494 transitions. [2021-12-06 18:42:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2021-12-06 18:42:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 494 transitions. [2021-12-06 18:42:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 18:42:59,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:42:59,449 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:42:59,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:42:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:59,650 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:42:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:42:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash -193422740, now seen corresponding path program 7 times [2021-12-06 18:42:59,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:42:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622181405] [2021-12-06 18:42:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:42:59,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:42:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:42:59,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:42:59,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622181405] [2021-12-06 18:42:59,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622181405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:42:59,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122508928] [2021-12-06 18:42:59,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:42:59,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:42:59,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:42:59,846 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:42:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:42:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:42:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:42:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:42:59,934 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:42:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:00,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122508928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:00,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:00,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2021-12-06 18:43:00,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803587638] [2021-12-06 18:43:00,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:00,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:43:00,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:43:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:43:00,827 INFO L87 Difference]: Start difference. First operand 435 states and 494 transitions. Second operand has 51 states, 50 states have (on average 3.34) internal successors, (167), 51 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:01,808 INFO L93 Difference]: Finished difference Result 575 states and 635 transitions. [2021-12-06 18:43:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:43:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.34) internal successors, (167), 51 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 18:43:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:01,810 INFO L225 Difference]: With dead ends: 575 [2021-12-06 18:43:01,810 INFO L226 Difference]: Without dead ends: 549 [2021-12-06 18:43:01,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1213, Invalid=4793, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:43:01,811 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 302 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:01,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 536 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:43:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-06 18:43:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 433. [2021-12-06 18:43:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 431 states have (on average 1.1299303944315546) internal successors, (487), 432 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 487 transitions. [2021-12-06 18:43:01,816 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 487 transitions. Word has length 59 [2021-12-06 18:43:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:01,816 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 487 transitions. [2021-12-06 18:43:01,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.34) internal successors, (167), 51 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 487 transitions. [2021-12-06 18:43:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:43:01,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:01,817 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:01,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:02,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:02,018 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:02,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1085063474, now seen corresponding path program 13 times [2021-12-06 18:43:02,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:02,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331288550] [2021-12-06 18:43:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:02,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:02,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331288550] [2021-12-06 18:43:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331288550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:02,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515411210] [2021-12-06 18:43:02,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:43:02,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:02,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:02,225 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:02,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:43:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 18:43:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:02,317 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:02,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:02,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 120 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515411210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:03,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:03,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 59 [2021-12-06 18:43:03,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871819668] [2021-12-06 18:43:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:03,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:43:03,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:43:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=3128, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:43:03,330 INFO L87 Difference]: Start difference. First operand 433 states and 487 transitions. Second operand has 60 states, 59 states have (on average 2.9322033898305087) internal successors, (173), 60 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:04,484 INFO L93 Difference]: Finished difference Result 689 states and 754 transitions. [2021-12-06 18:43:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:43:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.9322033898305087) internal successors, (173), 60 states have internal predecessors, (173), 0 states have call successors, (0), 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 61 [2021-12-06 18:43:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:04,487 INFO L225 Difference]: With dead ends: 689 [2021-12-06 18:43:04,487 INFO L226 Difference]: Without dead ends: 689 [2021-12-06 18:43:04,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1375, Invalid=5765, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:43:04,488 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 447 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:04,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 759 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:43:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-12-06 18:43:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 441. [2021-12-06 18:43:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 439 states have (on average 1.1343963553530751) internal successors, (498), 440 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 498 transitions. [2021-12-06 18:43:04,493 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 498 transitions. Word has length 61 [2021-12-06 18:43:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 498 transitions. [2021-12-06 18:43:04,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.9322033898305087) internal successors, (173), 60 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 498 transitions. [2021-12-06 18:43:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:43:04,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:04,494 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:04,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:04,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-06 18:43:04,696 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:04,697 INFO L85 PathProgramCache]: Analyzing trace with hash -881133237, now seen corresponding path program 8 times [2021-12-06 18:43:04,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:04,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702929798] [2021-12-06 18:43:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:04,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:43:05,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702929798] [2021-12-06 18:43:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702929798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495320546] [2021-12-06 18:43:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:05,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:05,038 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:05,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:43:05,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:05,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 18:43:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:05,142 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:05,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:43:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:05,626 INFO L354 Elim1Store]: treesize reduction 12, result has 68.4 percent of original size [2021-12-06 18:43:05,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-12-06 18:43:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:43:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-12-06 18:43:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:06,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2021-12-06 18:43:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:43:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495320546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:06,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:06,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 50 [2021-12-06 18:43:06,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193911599] [2021-12-06 18:43:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:43:06,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:43:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2247, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:43:06,836 INFO L87 Difference]: Start difference. First operand 441 states and 498 transitions. Second operand has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:09,251 INFO L93 Difference]: Finished difference Result 564 states and 616 transitions. [2021-12-06 18:43:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 18:43:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 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 61 [2021-12-06 18:43:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:09,253 INFO L225 Difference]: With dead ends: 564 [2021-12-06 18:43:09,254 INFO L226 Difference]: Without dead ends: 501 [2021-12-06 18:43:09,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=811, Invalid=8501, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:43:09,254 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 168 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:09,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 669 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1783 Invalid, 0 Unknown, 141 Unchecked, 0.7s Time] [2021-12-06 18:43:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-06 18:43:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 398. [2021-12-06 18:43:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.128787878787879) internal successors, (447), 397 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 447 transitions. [2021-12-06 18:43:09,259 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 447 transitions. Word has length 61 [2021-12-06 18:43:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 447 transitions. [2021-12-06 18:43:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.68) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 447 transitions. [2021-12-06 18:43:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:43:09,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:09,259 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:09,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 18:43:09,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 18:43:09,461 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash 931055015, now seen corresponding path program 14 times [2021-12-06 18:43:09,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:09,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261671367] [2021-12-06 18:43:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:09,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:10,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261671367] [2021-12-06 18:43:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261671367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907144610] [2021-12-06 18:43:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:43:10,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:10,556 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:10,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:43:10,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:43:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 18:43:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:11,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:43:11,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 35 [2021-12-06 18:43:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:11,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:12,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2021-12-06 18:43:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 165 [2021-12-06 18:43:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907144610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:13,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:13,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 72 [2021-12-06 18:43:13,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494681793] [2021-12-06 18:43:13,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:13,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:43:13,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:43:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=4565, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:43:13,477 INFO L87 Difference]: Start difference. First operand 398 states and 447 transitions. Second operand has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:25,923 INFO L93 Difference]: Finished difference Result 753 states and 818 transitions. [2021-12-06 18:43:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 18:43:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 18:43:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:25,926 INFO L225 Difference]: With dead ends: 753 [2021-12-06 18:43:25,926 INFO L226 Difference]: Without dead ends: 734 [2021-12-06 18:43:25,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7438 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4365, Invalid=23691, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 18:43:25,927 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 763 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 392 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:43:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-12-06 18:43:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 469. [2021-12-06 18:43:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 467 states have (on average 1.1327623126338329) internal successors, (529), 468 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 529 transitions. [2021-12-06 18:43:25,936 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 529 transitions. Word has length 63 [2021-12-06 18:43:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 529 transitions. [2021-12-06 18:43:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 529 transitions. [2021-12-06 18:43:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:43:25,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:25,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:25,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 18:43:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 18:43:26,138 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -534149555, now seen corresponding path program 1 times [2021-12-06 18:43:26,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:26,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365358099] [2021-12-06 18:43:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:26,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:43:26,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365358099] [2021-12-06 18:43:26,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365358099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139469715] [2021-12-06 18:43:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:26,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:26,305 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:26,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:43:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:26,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:43:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:26,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:43:26,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:43:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:43:26,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:43:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139469715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:26,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:26,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 41 [2021-12-06 18:43:26,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369523617] [2021-12-06 18:43:26,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:26,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:43:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:43:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:43:26,870 INFO L87 Difference]: Start difference. First operand 469 states and 529 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:28,856 INFO L93 Difference]: Finished difference Result 1040 states and 1164 transitions. [2021-12-06 18:43:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-06 18:43:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 18:43:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:28,859 INFO L225 Difference]: With dead ends: 1040 [2021-12-06 18:43:28,859 INFO L226 Difference]: Without dead ends: 787 [2021-12-06 18:43:28,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2809, Invalid=11953, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 18:43:28,860 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 897 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:28,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 296 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:43:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-06 18:43:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 731. [2021-12-06 18:43:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 729 states have (on average 1.1275720164609053) internal successors, (822), 730 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 822 transitions. [2021-12-06 18:43:28,867 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 822 transitions. Word has length 65 [2021-12-06 18:43:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 822 transitions. [2021-12-06 18:43:28,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 822 transitions. [2021-12-06 18:43:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:43:28,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:28,869 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:28,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:29,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:29,070 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash 525787682, now seen corresponding path program 9 times [2021-12-06 18:43:29,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138742027] [2021-12-06 18:43:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:29,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:29,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:29,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138742027] [2021-12-06 18:43:29,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138742027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:29,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996334541] [2021-12-06 18:43:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:43:29,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:29,259 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:29,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 18:43:29,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:43:29,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 18:43:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:29,424 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:29,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:29,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:43:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:30,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:30,344 INFO L354 Elim1Store]: treesize reduction 22, result has 81.5 percent of original size [2021-12-06 18:43:30,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 119 [2021-12-06 18:43:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 18:43:30,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2021-12-06 18:43:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:31,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:31,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 158 [2021-12-06 18:43:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:43:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996334541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:32,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 26] total 65 [2021-12-06 18:43:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116786329] [2021-12-06 18:43:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:32,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:43:32,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:43:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=3865, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:43:32,862 INFO L87 Difference]: Start difference. First operand 731 states and 822 transitions. Second operand has 66 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:37,047 INFO L93 Difference]: Finished difference Result 953 states and 1064 transitions. [2021-12-06 18:43:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 18:43:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 18:43:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:37,050 INFO L225 Difference]: With dead ends: 953 [2021-12-06 18:43:37,051 INFO L226 Difference]: Without dead ends: 860 [2021-12-06 18:43:37,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4080 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1816, Invalid=15476, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 18:43:37,052 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:37,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 753 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1874 Invalid, 0 Unknown, 431 Unchecked, 0.7s Time] [2021-12-06 18:43:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-06 18:43:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 706. [2021-12-06 18:43:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 704 states have (on average 1.1363636363636365) internal successors, (800), 705 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 800 transitions. [2021-12-06 18:43:37,058 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 800 transitions. Word has length 65 [2021-12-06 18:43:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:37,058 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 800 transitions. [2021-12-06 18:43:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 800 transitions. [2021-12-06 18:43:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:43:37,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:37,059 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:37,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-06 18:43:37,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 18:43:37,261 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1378829372, now seen corresponding path program 15 times [2021-12-06 18:43:37,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795109958] [2021-12-06 18:43:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:37,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:37,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795109958] [2021-12-06 18:43:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795109958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613719545] [2021-12-06 18:43:37,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:43:37,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:37,491 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:37,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 18:43:37,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 18:43:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:43:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:37,641 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:37,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:38,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613719545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:38,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:38,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2021-12-06 18:43:38,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785575813] [2021-12-06 18:43:38,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:38,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 18:43:38,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 18:43:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=3846, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:43:38,832 INFO L87 Difference]: Start difference. First operand 706 states and 800 transitions. Second operand has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:40,057 INFO L93 Difference]: Finished difference Result 1156 states and 1257 transitions. [2021-12-06 18:43:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:43:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 18:43:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:40,061 INFO L225 Difference]: With dead ends: 1156 [2021-12-06 18:43:40,061 INFO L226 Difference]: Without dead ends: 1156 [2021-12-06 18:43:40,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1773, Invalid=6969, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:43:40,062 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 489 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:40,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 590 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:43:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-12-06 18:43:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 708. [2021-12-06 18:43:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 706 states have (on average 1.1359773371104815) internal successors, (802), 707 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 802 transitions. [2021-12-06 18:43:40,071 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 802 transitions. Word has length 67 [2021-12-06 18:43:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 802 transitions. [2021-12-06 18:43:40,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 802 transitions. [2021-12-06 18:43:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:43:40,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:40,072 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:40,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 18:43:40,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 18:43:40,273 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2089868573, now seen corresponding path program 16 times [2021-12-06 18:43:40,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:40,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656454872] [2021-12-06 18:43:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:40,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:43:41,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656454872] [2021-12-06 18:43:41,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656454872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894263366] [2021-12-06 18:43:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:43:41,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:41,509 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:41,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 18:43:41,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:43:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 18:43:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:41,616 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:42,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:43:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:43,622 INFO L354 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2021-12-06 18:43:43,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 95 [2021-12-06 18:43:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 83 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:43,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 116 [2021-12-06 18:43:45,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 186 [2021-12-06 18:43:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:46,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894263366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:46,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:46,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 100 [2021-12-06 18:43:46,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591726280] [2021-12-06 18:43:46,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:46,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 18:43:46,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 18:43:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=8961, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 18:43:46,426 INFO L87 Difference]: Start difference. First operand 708 states and 802 transitions. Second operand has 100 states, 100 states have (on average 1.94) internal successors, (194), 100 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) [2021-12-06 18:43:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:49,522 INFO L93 Difference]: Finished difference Result 925 states and 1043 transitions. [2021-12-06 18:43:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:43:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.94) internal successors, (194), 100 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 69 [2021-12-06 18:43:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:49,525 INFO L225 Difference]: With dead ends: 925 [2021-12-06 18:43:49,525 INFO L226 Difference]: Without dead ends: 862 [2021-12-06 18:43:49,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6225 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2104, Invalid=17636, Unknown=0, NotChecked=0, Total=19740 [2021-12-06 18:43:49,526 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 248 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:49,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 558 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 998 Invalid, 0 Unknown, 704 Unchecked, 0.5s Time] [2021-12-06 18:43:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-06 18:43:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 783. [2021-12-06 18:43:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 781 states have (on average 1.1421254801536491) internal successors, (892), 782 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 892 transitions. [2021-12-06 18:43:49,533 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 892 transitions. Word has length 69 [2021-12-06 18:43:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 892 transitions. [2021-12-06 18:43:49,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.94) internal successors, (194), 100 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) [2021-12-06 18:43:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 892 transitions. [2021-12-06 18:43:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 18:43:49,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:49,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:49,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 18:43:49,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 18:43:49,735 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1008054230, now seen corresponding path program 10 times [2021-12-06 18:43:49,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:49,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636932339] [2021-12-06 18:43:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:49,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:43:49,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636932339] [2021-12-06 18:43:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636932339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207305023] [2021-12-06 18:43:49,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:43:49,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:49,913 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:49,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 18:43:49,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:43:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:49,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:43:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:43:50,017 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:50,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:43:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 18:43:50,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:43:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 18:43:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207305023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:50,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:50,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-12-06 18:43:50,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400700180] [2021-12-06 18:43:50,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:50,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 18:43:50,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 18:43:50,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:43:50,922 INFO L87 Difference]: Start difference. First operand 783 states and 892 transitions. Second operand has 38 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:54,133 INFO L93 Difference]: Finished difference Result 1014 states and 1120 transitions. [2021-12-06 18:43:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 18:43:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 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 71 [2021-12-06 18:43:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:54,137 INFO L225 Difference]: With dead ends: 1014 [2021-12-06 18:43:54,137 INFO L226 Difference]: Without dead ends: 995 [2021-12-06 18:43:54,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1645, Invalid=8861, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 18:43:54,137 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 527 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:54,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 676 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1531 Invalid, 0 Unknown, 20 Unchecked, 0.6s Time] [2021-12-06 18:43:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-12-06 18:43:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 790. [2021-12-06 18:43:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 788 states have (on average 1.1408629441624365) internal successors, (899), 789 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 899 transitions. [2021-12-06 18:43:54,145 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 899 transitions. Word has length 71 [2021-12-06 18:43:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 899 transitions. [2021-12-06 18:43:54,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 899 transitions. [2021-12-06 18:43:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:43:54,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:54,147 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:54,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 18:43:54,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:54,348 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1831274874, now seen corresponding path program 17 times [2021-12-06 18:43:54,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:54,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21163088] [2021-12-06 18:43:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:54,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:54,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:54,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21163088] [2021-12-06 18:43:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21163088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:54,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951979467] [2021-12-06 18:43:54,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:43:54,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:54,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:54,634 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 18:43:54,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:43:54,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 18:43:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:54,767 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:54,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 153 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 190 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:43:55,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951979467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:55,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:55,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2021-12-06 18:43:55,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204238822] [2021-12-06 18:43:55,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:55,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:43:55,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:43:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4180, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:43:55,986 INFO L87 Difference]: Start difference. First operand 790 states and 899 transitions. Second operand has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:43:57,090 INFO L93 Difference]: Finished difference Result 1442 states and 1563 transitions. [2021-12-06 18:43:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:43:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 18:43:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:43:57,096 INFO L225 Difference]: With dead ends: 1442 [2021-12-06 18:43:57,096 INFO L226 Difference]: Without dead ends: 1442 [2021-12-06 18:43:57,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1659, Invalid=6713, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 18:43:57,096 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 362 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:43:57,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1032 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:43:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-12-06 18:43:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 792. [2021-12-06 18:43:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 790 states have (on average 1.1405063291139241) internal successors, (901), 791 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 901 transitions. [2021-12-06 18:43:57,106 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 901 transitions. Word has length 73 [2021-12-06 18:43:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:43:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 901 transitions. [2021-12-06 18:43:57,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:43:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 901 transitions. [2021-12-06 18:43:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:43:57,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:43:57,107 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:43:57,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 18:43:57,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:57,308 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:43:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:43:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1523917955, now seen corresponding path program 11 times [2021-12-06 18:43:57,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:43:57,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64970312] [2021-12-06 18:43:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:43:57,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:43:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:43:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:43:57,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:43:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64970312] [2021-12-06 18:43:57,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64970312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:43:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584294719] [2021-12-06 18:43:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:43:57,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:43:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:43:57,633 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:43:57,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 18:43:57,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 18:43:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:43:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:43:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:43:57,877 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:43:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:43:58,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:43:58,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:43:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 18:43:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:43:58,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:43:58,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 18:43:58,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 18:43:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:43:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584294719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:43:58,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:43:58,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2021-12-06 18:43:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554307224] [2021-12-06 18:43:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:43:58,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:43:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:43:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:43:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:43:58,893 INFO L87 Difference]: Start difference. First operand 792 states and 901 transitions. Second operand has 48 states, 48 states have (on average 3.375) internal successors, (162), 48 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:00,388 INFO L93 Difference]: Finished difference Result 844 states and 951 transitions. [2021-12-06 18:44:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:44:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.375) internal successors, (162), 48 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 18:44:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:00,391 INFO L225 Difference]: With dead ends: 844 [2021-12-06 18:44:00,391 INFO L226 Difference]: Without dead ends: 839 [2021-12-06 18:44:00,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=827, Invalid=5979, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:44:00,392 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:00,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 746 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1550 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2021-12-06 18:44:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-12-06 18:44:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 778. [2021-12-06 18:44:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 776 states have (on average 1.1391752577319587) internal successors, (884), 777 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 884 transitions. [2021-12-06 18:44:00,399 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 884 transitions. Word has length 73 [2021-12-06 18:44:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:00,399 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 884 transitions. [2021-12-06 18:44:00,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.375) internal successors, (162), 48 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 884 transitions. [2021-12-06 18:44:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 18:44:00,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:00,400 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:00,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 18:44:00,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 18:44:00,601 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1081436845, now seen corresponding path program 18 times [2021-12-06 18:44:00,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:00,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361462477] [2021-12-06 18:44:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:00,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 102 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:01,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361462477] [2021-12-06 18:44:01,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361462477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623338500] [2021-12-06 18:44:01,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:44:01,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:01,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:01,912 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:01,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 18:44:02,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 18:44:02,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 18:44:02,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:44:04,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:04,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 43 [2021-12-06 18:44:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 30 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:04,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:04,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 129 [2021-12-06 18:44:04,403 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-12-06 18:44:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 245 treesize of output 207 [2021-12-06 18:44:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 120 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:06,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623338500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:06,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:06,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 81 [2021-12-06 18:44:06,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633236284] [2021-12-06 18:44:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:06,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:44:06,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:44:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=5742, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:44:06,050 INFO L87 Difference]: Start difference. First operand 778 states and 884 transitions. Second operand has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:26,181 INFO L93 Difference]: Finished difference Result 1603 states and 1743 transitions. [2021-12-06 18:44:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-06 18:44:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 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 75 [2021-12-06 18:44:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:26,186 INFO L225 Difference]: With dead ends: 1603 [2021-12-06 18:44:26,186 INFO L226 Difference]: Without dead ends: 1534 [2021-12-06 18:44:26,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=8109, Invalid=48773, Unknown=0, NotChecked=0, Total=56882 [2021-12-06 18:44:26,189 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 941 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 4083 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 5234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 4083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:26,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 819 Invalid, 5234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 4083 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 18:44:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-12-06 18:44:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 853. [2021-12-06 18:44:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 851 states have (on average 1.1445358401880141) internal successors, (974), 852 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 974 transitions. [2021-12-06 18:44:26,200 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 974 transitions. Word has length 75 [2021-12-06 18:44:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:26,200 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 974 transitions. [2021-12-06 18:44:26,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 974 transitions. [2021-12-06 18:44:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:44:26,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:26,201 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:26,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 18:44:26,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-06 18:44:26,403 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 829638640, now seen corresponding path program 19 times [2021-12-06 18:44:26,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:26,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76887132] [2021-12-06 18:44:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:26,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:26,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76887132] [2021-12-06 18:44:26,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76887132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456677332] [2021-12-06 18:44:26,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:44:26,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:26,717 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:26,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 18:44:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 18:44:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:26,821 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:26,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:44:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:28,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456677332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:28,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:28,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 77 [2021-12-06 18:44:28,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607721630] [2021-12-06 18:44:28,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:44:28,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:44:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=5339, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:44:28,361 INFO L87 Difference]: Start difference. First operand 853 states and 974 transitions. Second operand has 78 states, 77 states have (on average 2.948051948051948) internal successors, (227), 78 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:30,260 INFO L93 Difference]: Finished difference Result 1615 states and 1762 transitions. [2021-12-06 18:44:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 18:44:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.948051948051948) internal successors, (227), 78 states have internal predecessors, (227), 0 states have call successors, (0), 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 79 [2021-12-06 18:44:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:30,265 INFO L225 Difference]: With dead ends: 1615 [2021-12-06 18:44:30,265 INFO L226 Difference]: Without dead ends: 1615 [2021-12-06 18:44:30,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2407, Invalid=10249, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 18:44:30,266 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 529 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:30,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1277 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:44:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-12-06 18:44:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 855. [2021-12-06 18:44:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 853 states have (on average 1.1441969519343493) internal successors, (976), 854 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 976 transitions. [2021-12-06 18:44:30,277 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 976 transitions. Word has length 79 [2021-12-06 18:44:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:30,277 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 976 transitions. [2021-12-06 18:44:30,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.948051948051948) internal successors, (227), 78 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 976 transitions. [2021-12-06 18:44:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:44:30,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:30,279 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:30,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 18:44:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:30,480 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1491839033, now seen corresponding path program 12 times [2021-12-06 18:44:30,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529544286] [2021-12-06 18:44:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:30,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 14 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:44:30,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529544286] [2021-12-06 18:44:30,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529544286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039039963] [2021-12-06 18:44:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:44:30,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:30,914 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:30,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 18:44:31,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 18:44:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:44:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:31,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:44:31,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:44:31,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2021-12-06 18:44:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 23 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:44:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:31,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:44:31,756 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:44:31,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 18:44:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 38 proven. 66 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:44:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039039963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:32,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:32,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 51 [2021-12-06 18:44:32,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123292386] [2021-12-06 18:44:32,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:32,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:44:32,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:44:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:44:32,145 INFO L87 Difference]: Start difference. First operand 855 states and 976 transitions. Second operand has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:33,711 INFO L93 Difference]: Finished difference Result 1060 states and 1172 transitions. [2021-12-06 18:44:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 18:44:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 states have internal predecessors, (160), 0 states have call successors, (0), 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 79 [2021-12-06 18:44:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:33,715 INFO L225 Difference]: With dead ends: 1060 [2021-12-06 18:44:33,715 INFO L226 Difference]: Without dead ends: 1053 [2021-12-06 18:44:33,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2272, Invalid=6470, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:44:33,716 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 831 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:33,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 538 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:44:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-12-06 18:44:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 832. [2021-12-06 18:44:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 830 states have (on average 1.1397590361445784) internal successors, (946), 831 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 946 transitions. [2021-12-06 18:44:33,726 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 946 transitions. Word has length 79 [2021-12-06 18:44:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:33,726 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 946 transitions. [2021-12-06 18:44:33,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 946 transitions. [2021-12-06 18:44:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:44:33,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:33,728 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:33,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 18:44:33,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:33,928 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:33,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1581183415, now seen corresponding path program 20 times [2021-12-06 18:44:33,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072526812] [2021-12-06 18:44:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:33,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 105 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:35,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072526812] [2021-12-06 18:44:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072526812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597392021] [2021-12-06 18:44:35,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:44:35,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:35,713 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:35,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 18:44:35,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:44:35,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:44:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:44:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:44:39,895 INFO L354 Elim1Store]: treesize reduction 69, result has 51.4 percent of original size [2021-12-06 18:44:39,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 55 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 119 [2021-12-06 18:44:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:40,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 142 [2021-12-06 18:44:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:40,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 228 [2021-12-06 18:44:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 143 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:44:42,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597392021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:42,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:42,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 97 [2021-12-06 18:44:42,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070216554] [2021-12-06 18:44:42,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:42,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:44:42,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:44:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=8403, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:44:42,777 INFO L87 Difference]: Start difference. First operand 832 states and 946 transitions. Second operand has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:48,324 INFO L93 Difference]: Finished difference Result 1126 states and 1281 transitions. [2021-12-06 18:44:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:44:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:44:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:48,329 INFO L225 Difference]: With dead ends: 1126 [2021-12-06 18:44:48,329 INFO L226 Difference]: Without dead ends: 1076 [2021-12-06 18:44:48,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2697, Invalid=16763, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 18:44:48,330 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 469 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:48,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 419 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 786 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2021-12-06 18:44:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-12-06 18:44:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 956. [2021-12-06 18:44:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 954 states have (on average 1.1477987421383649) internal successors, (1095), 955 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1095 transitions. [2021-12-06 18:44:48,338 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1095 transitions. Word has length 81 [2021-12-06 18:44:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:48,339 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1095 transitions. [2021-12-06 18:44:48,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1095 transitions. [2021-12-06 18:44:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:44:48,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:48,340 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:48,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 18:44:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 18:44:48,541 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -358450356, now seen corresponding path program 13 times [2021-12-06 18:44:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:48,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241547086] [2021-12-06 18:44:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:48,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 47 proven. 107 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:44:48,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241547086] [2021-12-06 18:44:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241547086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021077460] [2021-12-06 18:44:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:44:48,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:48,734 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:48,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 18:44:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:44:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:48,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:48,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:44:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 59 proven. 95 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:44:49,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 53 proven. 101 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:44:49,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021077460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:49,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:49,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 53 [2021-12-06 18:44:49,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270677006] [2021-12-06 18:44:49,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:49,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:44:49,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:49,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:44:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:44:49,492 INFO L87 Difference]: Start difference. First operand 956 states and 1095 transitions. Second operand has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:50,234 INFO L93 Difference]: Finished difference Result 1220 states and 1355 transitions. [2021-12-06 18:44:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:44:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:44:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:50,238 INFO L225 Difference]: With dead ends: 1220 [2021-12-06 18:44:50,238 INFO L226 Difference]: Without dead ends: 1027 [2021-12-06 18:44:50,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1833, Invalid=5649, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 18:44:50,239 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 318 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:50,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 349 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:44:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-12-06 18:44:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 948. [2021-12-06 18:44:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.1384778012684988) internal successors, (1077), 947 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1077 transitions. [2021-12-06 18:44:50,249 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1077 transitions. Word has length 81 [2021-12-06 18:44:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:50,249 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1077 transitions. [2021-12-06 18:44:50,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1077 transitions. [2021-12-06 18:44:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:44:50,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:50,251 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:50,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-06 18:44:50,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 18:44:50,452 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1334244182, now seen corresponding path program 14 times [2021-12-06 18:44:50,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696003013] [2021-12-06 18:44:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:44:50,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696003013] [2021-12-06 18:44:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696003013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896950788] [2021-12-06 18:44:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:44:50,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:50,695 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:50,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 18:44:50,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:44:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:50,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 18:44:50,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:50,812 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:44:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:44:51,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:44:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896950788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:51,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:51,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-12-06 18:44:51,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722004000] [2021-12-06 18:44:51,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:51,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 18:44:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 18:44:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=2896, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 18:44:51,772 INFO L87 Difference]: Start difference. First operand 948 states and 1077 transitions. Second operand has 58 states, 57 states have (on average 3.56140350877193) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:52,417 INFO L93 Difference]: Finished difference Result 1122 states and 1259 transitions. [2021-12-06 18:44:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:44:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.56140350877193) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 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 83 [2021-12-06 18:44:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:52,421 INFO L225 Difference]: With dead ends: 1122 [2021-12-06 18:44:52,421 INFO L226 Difference]: Without dead ends: 1103 [2021-12-06 18:44:52,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1116, Invalid=4736, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:44:52,422 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 493 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 562 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:44:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-12-06 18:44:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 948. [2021-12-06 18:44:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.1321353065539113) internal successors, (1071), 947 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1071 transitions. [2021-12-06 18:44:52,430 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1071 transitions. Word has length 83 [2021-12-06 18:44:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:52,430 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1071 transitions. [2021-12-06 18:44:52,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.56140350877193) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1071 transitions. [2021-12-06 18:44:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:44:52,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:52,431 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:52,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 18:44:52,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:52,632 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1945200858, now seen corresponding path program 21 times [2021-12-06 18:44:52,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066400717] [2021-12-06 18:44:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:52,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:52,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066400717] [2021-12-06 18:44:52,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066400717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803056416] [2021-12-06 18:44:52,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:44:52,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:52,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:52,949 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:52,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 18:44:53,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 18:44:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 18:44:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:53,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:53,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:44:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:53,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:44:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803056416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:54,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:54,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2021-12-06 18:44:54,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286018562] [2021-12-06 18:44:54,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:54,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 18:44:54,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 18:44:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=6225, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:44:54,934 INFO L87 Difference]: Start difference. First operand 948 states and 1071 transitions. Second operand has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:44:56,643 INFO L93 Difference]: Finished difference Result 1623 states and 1776 transitions. [2021-12-06 18:44:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 18:44:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 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 85 [2021-12-06 18:44:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:44:56,649 INFO L225 Difference]: With dead ends: 1623 [2021-12-06 18:44:56,649 INFO L226 Difference]: Without dead ends: 1623 [2021-12-06 18:44:56,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2869, Invalid=11411, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 18:44:56,650 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 680 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:44:56,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 895 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:44:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-12-06 18:44:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 960. [2021-12-06 18:44:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 958 states have (on average 1.1356993736951984) internal successors, (1088), 959 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1088 transitions. [2021-12-06 18:44:56,659 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1088 transitions. Word has length 85 [2021-12-06 18:44:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:44:56,659 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1088 transitions. [2021-12-06 18:44:56,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:44:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1088 transitions. [2021-12-06 18:44:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:44:56,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:44:56,660 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:44:56,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 18:44:56,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:56,861 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:44:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:44:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1909828783, now seen corresponding path program 15 times [2021-12-06 18:44:56,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:44:56,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129793311] [2021-12-06 18:44:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:44:56,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:44:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:44:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 123 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:44:57,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:44:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129793311] [2021-12-06 18:44:57,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129793311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:44:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209500589] [2021-12-06 18:44:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:44:57,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:44:57,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:44:57,579 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:44:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 18:44:57,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 18:44:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:44:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:44:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:44:57,846 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:44:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:44:58,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:44:58,329 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-12-06 18:44:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 18:44:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 18:44:58,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:44:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-12-06 18:44:59,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:59,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:59,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:44:59,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2021-12-06 18:44:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 18:44:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209500589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:44:59,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:44:59,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 64 [2021-12-06 18:44:59,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435653553] [2021-12-06 18:44:59,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:44:59,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 18:44:59,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:44:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 18:44:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=3700, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 18:44:59,590 INFO L87 Difference]: Start difference. First operand 960 states and 1088 transitions. Second operand has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:02,659 INFO L93 Difference]: Finished difference Result 1133 states and 1260 transitions. [2021-12-06 18:45:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:45:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 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 85 [2021-12-06 18:45:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:02,664 INFO L225 Difference]: With dead ends: 1133 [2021-12-06 18:45:02,664 INFO L226 Difference]: Without dead ends: 1071 [2021-12-06 18:45:02,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1136, Invalid=11974, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 18:45:02,666 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 295 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:02,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 692 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1944 Invalid, 0 Unknown, 80 Unchecked, 0.8s Time] [2021-12-06 18:45:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-12-06 18:45:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 953. [2021-12-06 18:45:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 951 states have (on average 1.1219768664563616) internal successors, (1067), 952 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1067 transitions. [2021-12-06 18:45:02,674 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1067 transitions. Word has length 85 [2021-12-06 18:45:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:02,674 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1067 transitions. [2021-12-06 18:45:02,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1067 transitions. [2021-12-06 18:45:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:45:02,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:02,675 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:02,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:02,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:02,876 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 844043049, now seen corresponding path program 16 times [2021-12-06 18:45:02,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:02,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721721947] [2021-12-06 18:45:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:02,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 26 proven. 149 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:45:04,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721721947] [2021-12-06 18:45:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721721947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150120601] [2021-12-06 18:45:04,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:45:04,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:04,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:04,366 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:04,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 18:45:04,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:45:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 18:45:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:04,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:45:04,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:45:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:45:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:05,890 INFO L354 Elim1Store]: treesize reduction 26, result has 55.9 percent of original size [2021-12-06 18:45:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 55 [2021-12-06 18:45:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 155 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:45:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:07,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2021-12-06 18:45:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:07,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2021-12-06 18:45:08,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 47 proven. 136 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:45:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150120601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:08,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 91 [2021-12-06 18:45:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359981073] [2021-12-06 18:45:08,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 18:45:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 18:45:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=7549, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 18:45:08,668 INFO L87 Difference]: Start difference. First operand 953 states and 1067 transitions. Second operand has 91 states, 91 states have (on average 2.3736263736263736) internal successors, (216), 91 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:14,770 INFO L93 Difference]: Finished difference Result 1012 states and 1120 transitions. [2021-12-06 18:45:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 18:45:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.3736263736263736) internal successors, (216), 91 states have internal predecessors, (216), 0 states have call successors, (0), 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 85 [2021-12-06 18:45:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:14,772 INFO L225 Difference]: With dead ends: 1012 [2021-12-06 18:45:14,772 INFO L226 Difference]: Without dead ends: 934 [2021-12-06 18:45:14,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8052 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2193, Invalid=24867, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 18:45:14,773 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 848 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:14,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 885 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2352 Invalid, 0 Unknown, 375 Unchecked, 1.1s Time] [2021-12-06 18:45:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-12-06 18:45:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 919. [2021-12-06 18:45:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 917 states have (on average 1.1221374045801527) internal successors, (1029), 918 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1029 transitions. [2021-12-06 18:45:14,779 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1029 transitions. Word has length 85 [2021-12-06 18:45:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:14,779 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1029 transitions. [2021-12-06 18:45:14,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.3736263736263736) internal successors, (216), 91 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1029 transitions. [2021-12-06 18:45:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:45:14,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:14,781 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:14,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 18:45:14,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:14,982 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1027250177, now seen corresponding path program 22 times [2021-12-06 18:45:14,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767312943] [2021-12-06 18:45:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:14,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:45:17,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767312943] [2021-12-06 18:45:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767312943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180144083] [2021-12-06 18:45:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:45:17,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:17,067 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:17,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 18:45:17,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:45:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:45:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:17,269 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:17,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:45:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:45:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:45:21,023 INFO L354 Elim1Store]: treesize reduction 68, result has 52.4 percent of original size [2021-12-06 18:45:21,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 12 case distinctions, treesize of input 127 treesize of output 125 [2021-12-06 18:45:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:22,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 155 [2021-12-06 18:45:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:45:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 249 [2021-12-06 18:45:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 157 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180144083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 129 [2021-12-06 18:45:27,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318353577] [2021-12-06 18:45:27,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-06 18:45:27,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-06 18:45:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=14967, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 18:45:27,556 INFO L87 Difference]: Start difference. First operand 919 states and 1029 transitions. Second operand has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:36,632 INFO L93 Difference]: Finished difference Result 1247 states and 1394 transitions. [2021-12-06 18:45:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 18:45:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 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 87 [2021-12-06 18:45:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:36,634 INFO L225 Difference]: With dead ends: 1247 [2021-12-06 18:45:36,634 INFO L226 Difference]: Without dead ends: 1216 [2021-12-06 18:45:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13233 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=4336, Invalid=37076, Unknown=0, NotChecked=0, Total=41412 [2021-12-06 18:45:36,636 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1057 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:36,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 647 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1582 Invalid, 0 Unknown, 170 Unchecked, 0.9s Time] [2021-12-06 18:45:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-06 18:45:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1078. [2021-12-06 18:45:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1076 states have (on average 1.1282527881040891) internal successors, (1214), 1077 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1214 transitions. [2021-12-06 18:45:36,644 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1214 transitions. Word has length 87 [2021-12-06 18:45:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:36,644 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1214 transitions. [2021-12-06 18:45:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1214 transitions. [2021-12-06 18:45:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:45:36,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:36,645 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:36,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 18:45:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:36,846 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash 537031814, now seen corresponding path program 17 times [2021-12-06 18:45:36,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:36,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213490432] [2021-12-06 18:45:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:36,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 91 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:45:37,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:37,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213490432] [2021-12-06 18:45:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213490432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:37,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262012279] [2021-12-06 18:45:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:45:37,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:37,129 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 18:45:37,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:45:37,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:45:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:37,601 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:45:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 120 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:45:38,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 153 proven. 63 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:45:38,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262012279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:38,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:38,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 68 [2021-12-06 18:45:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441029809] [2021-12-06 18:45:38,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:38,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 18:45:38,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 18:45:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:45:38,923 INFO L87 Difference]: Start difference. First operand 1078 states and 1214 transitions. Second operand has 69 states, 68 states have (on average 3.426470588235294) internal successors, (233), 69 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:40,348 INFO L93 Difference]: Finished difference Result 1324 states and 1463 transitions. [2021-12-06 18:45:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 18:45:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.426470588235294) internal successors, (233), 69 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 18:45:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:40,349 INFO L225 Difference]: With dead ends: 1324 [2021-12-06 18:45:40,350 INFO L226 Difference]: Without dead ends: 1309 [2021-12-06 18:45:40,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2152, Invalid=8768, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 18:45:40,350 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 327 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:40,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 881 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:45:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-06 18:45:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1080. [2021-12-06 18:45:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1078 states have (on average 1.12430426716141) internal successors, (1212), 1079 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1212 transitions. [2021-12-06 18:45:40,359 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1212 transitions. Word has length 89 [2021-12-06 18:45:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:40,359 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1212 transitions. [2021-12-06 18:45:40,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.426470588235294) internal successors, (233), 69 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1212 transitions. [2021-12-06 18:45:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:45:40,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:40,360 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:40,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:40,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:40,561 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -108128484, now seen corresponding path program 23 times [2021-12-06 18:45:40,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:40,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664051826] [2021-12-06 18:45:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:40,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:40,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664051826] [2021-12-06 18:45:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664051826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511883095] [2021-12-06 18:45:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:45:40,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:40,963 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:40,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 18:45:41,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 18:45:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 18:45:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:41,165 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:45:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:45:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:41,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 325 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511883095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:42,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:42,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 87 [2021-12-06 18:45:42,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739741436] [2021-12-06 18:45:42,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:45:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:45:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=6664, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:45:42,932 INFO L87 Difference]: Start difference. First operand 1080 states and 1212 transitions. Second operand has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:44,682 INFO L93 Difference]: Finished difference Result 1743 states and 1904 transitions. [2021-12-06 18:45:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:45:44,682 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 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 91 [2021-12-06 18:45:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:44,684 INFO L225 Difference]: With dead ends: 1743 [2021-12-06 18:45:44,684 INFO L226 Difference]: Without dead ends: 1743 [2021-12-06 18:45:44,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2529, Invalid=10581, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 18:45:44,685 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 527 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 4162 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 4162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:44,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 1686 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 4162 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:45:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-12-06 18:45:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1092. [2021-12-06 18:45:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1090 states have (on average 1.1275229357798164) internal successors, (1229), 1091 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1229 transitions. [2021-12-06 18:45:44,694 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1229 transitions. Word has length 91 [2021-12-06 18:45:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:44,694 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1229 transitions. [2021-12-06 18:45:44,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 88 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1229 transitions. [2021-12-06 18:45:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:45:44,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:44,695 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:44,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 18:45:44,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:44,897 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash -482138017, now seen corresponding path program 18 times [2021-12-06 18:45:44,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:44,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435583537] [2021-12-06 18:45:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:44,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 186 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:45:46,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435583537] [2021-12-06 18:45:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435583537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040509366] [2021-12-06 18:45:46,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:45:46,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:46,018 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:46,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 18:45:46,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 18:45:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:45:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:45:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:47,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:45:47,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:45:47,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 27 [2021-12-06 18:45:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:45:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:48,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-12-06 18:45:48,094 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-12-06 18:45:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 145 treesize of output 123 [2021-12-06 18:45:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 69 proven. 153 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:45:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040509366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:49,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:49,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 79 [2021-12-06 18:45:49,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182295024] [2021-12-06 18:45:49,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:49,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 18:45:49,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 18:45:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=5486, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 18:45:49,129 INFO L87 Difference]: Start difference. First operand 1092 states and 1229 transitions. Second operand has 79 states, 79 states have (on average 2.5949367088607596) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:58,534 INFO L93 Difference]: Finished difference Result 1319 states and 1449 transitions. [2021-12-06 18:45:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 18:45:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.5949367088607596) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 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 91 [2021-12-06 18:45:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:58,536 INFO L225 Difference]: With dead ends: 1319 [2021-12-06 18:45:58,536 INFO L226 Difference]: Without dead ends: 1289 [2021-12-06 18:45:58,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9914 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4744, Invalid=29666, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 18:45:58,539 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1315 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:58,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 1249 Invalid, 3946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 3260 Invalid, 0 Unknown, 152 Unchecked, 1.5s Time] [2021-12-06 18:45:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-06 18:45:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1054. [2021-12-06 18:45:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1052 states have (on average 1.1283269961977187) internal successors, (1187), 1053 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1187 transitions. [2021-12-06 18:45:58,551 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1187 transitions. Word has length 91 [2021-12-06 18:45:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:58,551 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1187 transitions. [2021-12-06 18:45:58,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.5949367088607596) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1187 transitions. [2021-12-06 18:45:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:45:58,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:58,552 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:58,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 18:45:58,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:58,753 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:45:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash -832257419, now seen corresponding path program 24 times [2021-12-06 18:45:58,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:58,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706832144] [2021-12-06 18:45:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:58,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 149 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:46:00,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706832144] [2021-12-06 18:46:00,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706832144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:46:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956439630] [2021-12-06 18:46:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:46:00,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:46:00,956 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:46:00,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 18:46:01,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 18:46:01,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:46:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 18:46:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:46:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:48:03,463 INFO L354 Elim1Store]: treesize reduction 1028, result has 4.8 percent of original size [2021-12-06 18:48:03,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 106 [2021-12-06 18:48:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 61 proven. 337 refuted. 122 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:03,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:48:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 168 [2021-12-06 18:48:04,706 INFO L354 Elim1Store]: treesize reduction 912, result has 0.1 percent of original size [2021-12-06 18:48:04,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 320 treesize of output 270 [2021-12-06 18:48:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 195 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:48:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956439630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:48:06,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:48:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 110 [2021-12-06 18:48:06,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562966323] [2021-12-06 18:48:06,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:48:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 18:48:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 18:48:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=10763, Unknown=166, NotChecked=0, Total=11990 [2021-12-06 18:48:06,136 INFO L87 Difference]: Start difference. First operand 1054 states and 1187 transitions. Second operand has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 110 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:49:42,558 WARN L227 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:50:04,639 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:50:16,344 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:50:22,772 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 70 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:50:48,892 WARN L227 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 72 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:51:05,430 WARN L227 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:51:16,163 WARN L227 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 80 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:51:49,936 WARN L227 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:52:08,059 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:52:48,017 WARN L227 SmtUtils]: Spent 28.33s on a formula simplification. DAG size of input: 100 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:53:08,293 WARN L227 SmtUtils]: Spent 7.32s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:53:37,768 WARN L227 SmtUtils]: Spent 15.05s on a formula simplification. DAG size of input: 105 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:53:58,413 WARN L227 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:54:32,832 WARN L227 SmtUtils]: Spent 18.09s on a formula simplification. DAG size of input: 110 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:54:46,894 WARN L227 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:55:16,239 WARN L227 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 111 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:55:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:16,652 INFO L93 Difference]: Finished difference Result 1725 states and 1897 transitions. [2021-12-06 18:55:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-06 18:55:16,653 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 110 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 18:55:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:16,655 INFO L225 Difference]: With dead ends: 1725 [2021-12-06 18:55:16,655 INFO L226 Difference]: Without dead ends: 1696 [2021-12-06 18:55:16,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 14444 ImplicationChecksByTransitivity, 553.1s TimeCoverageRelationStatistics Valid=5478, Invalid=40159, Unknown=373, NotChecked=0, Total=46010 [2021-12-06 18:55:16,657 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1247 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 3687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:16,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1247 Valid, 1197 Invalid, 3687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2640 Invalid, 0 Unknown, 576 Unchecked, 1.6s Time] [2021-12-06 18:55:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-12-06 18:55:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1213. [2021-12-06 18:55:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1211 states have (on average 1.1362510322047894) internal successors, (1376), 1212 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1376 transitions. [2021-12-06 18:55:16,668 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1376 transitions. Word has length 93 [2021-12-06 18:55:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:16,668 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1376 transitions. [2021-12-06 18:55:16,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.190909090909091) internal successors, (241), 110 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1376 transitions. [2021-12-06 18:55:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:55:16,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:16,670 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:16,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 18:55:16,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 18:55:16,871 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:55:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 347869770, now seen corresponding path program 19 times [2021-12-06 18:55:16,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035374018] [2021-12-06 18:55:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:16,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 61 proven. 62 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 18:55:17,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035374018] [2021-12-06 18:55:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035374018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136209671] [2021-12-06 18:55:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:55:17,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:17,071 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 18:55:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 18:55:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:55:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 18:55:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:55:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 18:55:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-06 18:55:17,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136209671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:17,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:17,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 42 [2021-12-06 18:55:17,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523793650] [2021-12-06 18:55:17,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:55:17,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:55:17,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:55:17,829 INFO L87 Difference]: Start difference. First operand 1213 states and 1376 transitions. Second operand has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 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) [2021-12-06 18:55:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:18,755 INFO L93 Difference]: Finished difference Result 1794 states and 2016 transitions. [2021-12-06 18:55:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:55:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 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 93 [2021-12-06 18:55:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:18,757 INFO L225 Difference]: With dead ends: 1794 [2021-12-06 18:55:18,757 INFO L226 Difference]: Without dead ends: 1590 [2021-12-06 18:55:18,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1790, Invalid=6400, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 18:55:18,758 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 575 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:18,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 364 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:55:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-12-06 18:55:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1456. [2021-12-06 18:55:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1454 states have (on average 1.1430536451169189) internal successors, (1662), 1455 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1662 transitions. [2021-12-06 18:55:18,768 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1662 transitions. Word has length 93 [2021-12-06 18:55:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:18,768 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1662 transitions. [2021-12-06 18:55:18,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 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) [2021-12-06 18:55:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1662 transitions. [2021-12-06 18:55:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 18:55:18,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:18,770 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:18,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 18:55:18,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:18,971 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:55:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:18,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1331916808, now seen corresponding path program 20 times [2021-12-06 18:55:18,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:18,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522630501] [2021-12-06 18:55:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:18,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 66 proven. 121 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:55:19,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522630501] [2021-12-06 18:55:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522630501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601655696] [2021-12-06 18:55:19,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:55:19,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:19,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:19,244 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:19,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 18:55:19,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:55:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 18:55:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:19,393 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:55:19,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:55:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 91 proven. 96 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:55:19,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 120 proven. 67 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:55:20,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601655696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:20,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:20,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2021-12-06 18:55:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649506007] [2021-12-06 18:55:20,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 18:55:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 18:55:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=3539, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 18:55:20,564 INFO L87 Difference]: Start difference. First operand 1456 states and 1662 transitions. Second operand has 64 states, 63 states have (on average 3.6031746031746033) internal successors, (227), 64 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:21,367 INFO L93 Difference]: Finished difference Result 1661 states and 1865 transitions. [2021-12-06 18:55:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:55:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.6031746031746033) internal successors, (227), 64 states have internal predecessors, (227), 0 states have call successors, (0), 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 95 [2021-12-06 18:55:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:21,368 INFO L225 Difference]: With dead ends: 1661 [2021-12-06 18:55:21,369 INFO L226 Difference]: Without dead ends: 1638 [2021-12-06 18:55:21,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1434, Invalid=6048, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 18:55:21,369 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 304 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:21,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 701 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:55:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-12-06 18:55:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1456. [2021-12-06 18:55:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1454 states have (on average 1.142365887207703) internal successors, (1661), 1455 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1661 transitions. [2021-12-06 18:55:21,380 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1661 transitions. Word has length 95 [2021-12-06 18:55:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:21,380 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1661 transitions. [2021-12-06 18:55:21,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.6031746031746033) internal successors, (227), 64 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:55:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1661 transitions. [2021-12-06 18:55:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 18:55:21,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:21,381 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:21,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 18:55:21,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:21,582 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 18:55:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash -221425668, now seen corresponding path program 21 times [2021-12-06 18:55:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:21,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106232217] [2021-12-06 18:55:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:21,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 120 proven. 147 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:55:21,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106232217] [2021-12-06 18:55:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106232217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590915926] [2021-12-06 18:55:21,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:55:21,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:21,928 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:21,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5102ff59-5142-4a6d-8039-888b7511d110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 18:55:22,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 18:55:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:55:22,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 18:55:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:22,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:55:22,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:55:23,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:55:47,507 INFO L354 Elim1Store]: treesize reduction 14, result has 92.5 percent of original size [2021-12-06 18:55:47,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 199 [2021-12-06 18:55:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 43 proven. 86 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 18:55:49,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:51,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2021-12-06 18:55:51,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:55:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 223