./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-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_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/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_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/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_08ad65eb-cc49-408a-8e86-7e60d988b4d6/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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:37:21,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:37:21,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:37:21,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:37:21,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:37:21,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:37:21,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:37:21,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:37:21,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:37:21,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:37:21,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:37:21,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:37:21,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:37:21,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:37:21,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:37:21,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:37:21,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:37:21,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:37:21,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:37:21,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:37:21,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:37:21,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:37:21,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:37:21,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:37:21,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:37:21,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:37:21,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:37:21,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:37:21,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:37:21,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:37:21,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:37:21,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:37:21,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:37:21,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:37:21,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:37:21,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:37:21,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:37:21,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:37:21,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:37:21,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:37:21,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:37:21,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:37:21,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:37:21,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:37:21,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:37:21,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:37:21,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:37:21,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:37:21,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:37:21,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:37:21,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:37:21,270 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:37:21,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:37:21,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:37:21,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:37:21,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:37:21,273 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_08ad65eb-cc49-408a-8e86-7e60d988b4d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2021-12-07 01:37:21,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:37:21,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:37:21,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:37:21,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:37:21,481 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:37:21,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-12-07 01:37:21,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/data/ab27bc45d/692dcf972951404fb9fdd29e82a5e1bb/FLAGdefa6e38f [2021-12-07 01:37:21,956 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:37:21,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-12-07 01:37:21,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/data/ab27bc45d/692dcf972951404fb9fdd29e82a5e1bb/FLAGdefa6e38f [2021-12-07 01:37:21,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/data/ab27bc45d/692dcf972951404fb9fdd29e82a5e1bb [2021-12-07 01:37:21,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:37:21,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:37:21,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:37:21,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:37:21,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:37:21,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:37:21" (1/1) ... [2021-12-07 01:37:21,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1295ddfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:21, skipping insertion in model container [2021-12-07 01:37:21,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:37:21" (1/1) ... [2021-12-07 01:37:21,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:37:22,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:37:22,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:37:22,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:37:22,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:37:22,261 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:37:22,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22 WrapperNode [2021-12-07 01:37:22,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:37:22,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:37:22,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:37:22,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:37:22,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,295 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-12-07 01:37:22,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:37:22,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:37:22,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:37:22,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:37:22,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:37:22,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:37:22,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:37:22,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:37:22,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (1/1) ... [2021-12-07 01:37:22,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:37:22,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:22,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:37:22,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:37:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:37:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:37:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:37:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:37:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:37:22,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:37:22,463 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:37:22,464 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:37:22,659 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:37:22,665 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:37:22,665 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 01:37:22,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:37:22 BoogieIcfgContainer [2021-12-07 01:37:22,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:37:22,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:37:22,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:37:22,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:37:22,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:37:21" (1/3) ... [2021-12-07 01:37:22,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762a6f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:37:22, skipping insertion in model container [2021-12-07 01:37:22,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:37:22" (2/3) ... [2021-12-07 01:37:22,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762a6f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:37:22, skipping insertion in model container [2021-12-07 01:37:22,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:37:22" (3/3) ... [2021-12-07 01:37:22,674 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2021-12-07 01:37:22,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:37:22,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-07 01:37:22,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:37:22,716 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 [2021-12-07 01:37:22,716 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-07 01:37:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:37:22,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:22,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:22,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2021-12-07 01:37:22,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366159881] [2021-12-07 01:37:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:22,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:22,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366159881] [2021-12-07 01:37:22,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366159881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:22,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:22,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:37:22,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146516825] [2021-12-07 01:37:22,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:22,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:37:22,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:37:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:37:22,888 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-12-07 01:37:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:22,932 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-07 01:37:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:37:22,934 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 [2021-12-07 01:37:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:22,940 INFO L225 Difference]: With dead ends: 54 [2021-12-07 01:37:22,940 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 01:37:22,941 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 [2021-12-07 01:37:22,944 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:22,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 01:37:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 01:37:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-07 01:37:22,969 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-12-07 01:37:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:22,969 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-07 01:37:22,969 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) [2021-12-07 01:37:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-07 01:37:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 01:37:22,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:22,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:22,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:37:22,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-07 01:37:22,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:22,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854278973] [2021-12-07 01:37:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:22,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854278973] [2021-12-07 01:37:23,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854278973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:37:23,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609219573] [2021-12-07 01:37:23,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:23,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:23,026 INFO L87 Difference]: Start difference. First operand 51 states and 59 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) [2021-12-07 01:37:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,079 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-07 01:37:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:37:23,079 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 [2021-12-07 01:37:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,080 INFO L225 Difference]: With dead ends: 54 [2021-12-07 01:37:23,080 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 01:37:23,080 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 [2021-12-07 01:37:23,082 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 01:37:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 01:37:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 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) [2021-12-07 01:37:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-07 01:37:23,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2021-12-07 01:37:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-07 01:37:23,088 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) [2021-12-07 01:37:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-07 01:37:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 01:37:23,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:37:23,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-07 01:37:23,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302855750] [2021-12-07 01:37:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302855750] [2021-12-07 01:37:23,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302855750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:37:23,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161928741] [2021-12-07 01:37:23,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:37:23,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:37:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:37:23,143 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2021-12-07 01:37:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,169 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-12-07 01:37:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:37:23,170 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 [2021-12-07 01:37:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,170 INFO L225 Difference]: With dead ends: 49 [2021-12-07 01:37:23,170 INFO L226 Difference]: Without dead ends: 49 [2021-12-07 01:37:23,171 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 [2021-12-07 01:37:23,172 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-07 01:37:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-07 01:37:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 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) [2021-12-07 01:37:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-07 01:37:23,176 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2021-12-07 01:37:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-07 01:37:23,177 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) [2021-12-07 01:37:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-07 01:37:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 01:37:23,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:37:23,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2021-12-07 01:37:23,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254420476] [2021-12-07 01:37:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254420476] [2021-12-07 01:37:23,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254420476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:23,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108835763] [2021-12-07 01:37:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:23,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:23,242 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2021-12-07 01:37:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,311 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-12-07 01:37:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:37:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2021-12-07 01:37:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,313 INFO L225 Difference]: With dead ends: 91 [2021-12-07 01:37:23,313 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 01:37:23,313 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 [2021-12-07 01:37:23,314 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 01:37:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-12-07 01:37:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-07 01:37:23,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2021-12-07 01:37:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,320 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-07 01:37:23,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2021-12-07 01:37:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-07 01:37:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 01:37:23,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:37:23,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2021-12-07 01:37:23,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049968884] [2021-12-07 01:37:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049968884] [2021-12-07 01:37:23,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049968884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:23,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843316032] [2021-12-07 01:37:23,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:23,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:23,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:23,376 INFO L87 Difference]: Start difference. First operand 51 states and 59 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) [2021-12-07 01:37:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,413 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-07 01:37:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:37:23,413 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 [2021-12-07 01:37:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,414 INFO L225 Difference]: With dead ends: 50 [2021-12-07 01:37:23,414 INFO L226 Difference]: Without dead ends: 50 [2021-12-07 01:37:23,414 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 [2021-12-07 01:37:23,415 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-07 01:37:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-07 01:37:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 49 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) [2021-12-07 01:37:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-07 01:37:23,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2021-12-07 01:37:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-07 01:37:23,420 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) [2021-12-07 01:37:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-07 01:37:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 01:37:23,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:37:23,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2021-12-07 01:37:23,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888135577] [2021-12-07 01:37:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888135577] [2021-12-07 01:37:23,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888135577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:23,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988989395] [2021-12-07 01:37:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:37:23,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:37:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:37:23,462 INFO L87 Difference]: Start difference. First operand 50 states and 58 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) [2021-12-07 01:37:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,478 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-12-07 01:37:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:37:23,479 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 [2021-12-07 01:37:23,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,480 INFO L225 Difference]: With dead ends: 91 [2021-12-07 01:37:23,480 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 01:37:23,480 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 [2021-12-07 01:37:23,481 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 01:37:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-12-07 01:37:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-07 01:37:23,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2021-12-07 01:37:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-07 01:37:23,489 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) [2021-12-07 01:37:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-07 01:37:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 01:37:23,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 01:37:23,490 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2021-12-07 01:37:23,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559643179] [2021-12-07 01:37:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559643179] [2021-12-07 01:37:23,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559643179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:37:23,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905678350] [2021-12-07 01:37:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:23,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:23,534 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2021-12-07 01:37:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,582 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2021-12-07 01:37:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:37:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2021-12-07 01:37:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,584 INFO L225 Difference]: With dead ends: 129 [2021-12-07 01:37:23,584 INFO L226 Difference]: Without dead ends: 129 [2021-12-07 01:37:23,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:37:23,585 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-07 01:37:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 60. [2021-12-07 01:37:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-07 01:37:23,593 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2021-12-07 01:37:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,593 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-07 01:37:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2021-12-07 01:37:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-07 01:37:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:37:23,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:37:23,594 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2021-12-07 01:37:23,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800890013] [2021-12-07 01:37:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800890013] [2021-12-07 01:37:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800890013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:37:23,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658391461] [2021-12-07 01:37:23,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:37:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:37:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:37:23,625 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,642 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-07 01:37:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:37:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-07 01:37:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,643 INFO L225 Difference]: With dead ends: 58 [2021-12-07 01:37:23,644 INFO L226 Difference]: Without dead ends: 58 [2021-12-07 01:37:23,644 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 [2021-12-07 01:37:23,645 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-07 01:37:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-07 01:37:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-12-07 01:37:23,650 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 11 [2021-12-07 01:37:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,650 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-12-07 01:37:23,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-12-07 01:37:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:37:23,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 01:37:23,652 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2021-12-07 01:37:23,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117507197] [2021-12-07 01:37:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117507197] [2021-12-07 01:37:23,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117507197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:23,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:23,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:37:23,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044435986] [2021-12-07 01:37:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:23,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:37:23,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:37:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:37:23,694 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:23,713 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-12-07 01:37:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:37:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-07 01:37:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:23,714 INFO L225 Difference]: With dead ends: 57 [2021-12-07 01:37:23,714 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 01:37:23,714 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 [2021-12-07 01:37:23,715 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:23,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 01:37:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 01:37:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-07 01:37:23,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2021-12-07 01:37:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,720 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-07 01:37:23,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-07 01:37:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 01:37:23,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 01:37:23,721 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2021-12-07 01:37:23,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:23,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124976536] [2021-12-07 01:37:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124976536] [2021-12-07 01:37:23,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124976536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284306680] [2021-12-07 01:37:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:23,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:23,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:23,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:23,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:37:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:37:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:23,920 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 [2021-12-07 01:37:23,926 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 [2021-12-07 01:37:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:23,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:24,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284306680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:24,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:24,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-07 01:37:24,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785090477] [2021-12-07 01:37:24,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:24,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:37:24,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:37:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:37:24,157 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:24,304 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-12-07 01:37:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:37:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-12-07 01:37:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:24,305 INFO L225 Difference]: With dead ends: 128 [2021-12-07 01:37:24,305 INFO L226 Difference]: Without dead ends: 128 [2021-12-07 01:37:24,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:37:24,306 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:24,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 285 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-07 01:37:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2021-12-07 01:37:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 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) [2021-12-07 01:37:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-07 01:37:24,310 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2021-12-07 01:37:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:24,310 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-07 01:37:24,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-07 01:37:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:37:24,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:24,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:24,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:37:24,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:24,512 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2021-12-07 01:37:24,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:24,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379193350] [2021-12-07 01:37:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:24,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:24,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379193350] [2021-12-07 01:37:24,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379193350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:24,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:24,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:37:24,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166857085] [2021-12-07 01:37:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:24,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:37:24,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:37:24,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:37:24,538 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:24,562 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-12-07 01:37:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:37:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-07 01:37:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:24,563 INFO L225 Difference]: With dead ends: 49 [2021-12-07 01:37:24,563 INFO L226 Difference]: Without dead ends: 49 [2021-12-07 01:37:24,563 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 [2021-12-07 01:37:24,563 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:24,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-07 01:37:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-07 01:37:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-07 01:37:24,566 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2021-12-07 01:37:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-07 01:37:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-07 01:37:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:37:24,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:24,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 01:37:24,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2021-12-07 01:37:24,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:24,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605457851] [2021-12-07 01:37:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:24,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:24,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:24,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605457851] [2021-12-07 01:37:24,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605457851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:24,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:24,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:37:24,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557148290] [2021-12-07 01:37:24,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:24,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:37:24,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:24,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:37:24,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:37:24,619 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:24,684 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-12-07 01:37:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:37:24,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-07 01:37:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:24,685 INFO L225 Difference]: With dead ends: 72 [2021-12-07 01:37:24,685 INFO L226 Difference]: Without dead ends: 72 [2021-12-07 01:37:24,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:37:24,686 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:24,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-07 01:37:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-12-07 01:37:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-07 01:37:24,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-12-07 01:37:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:24,690 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-07 01:37:24,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-07 01:37:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 01:37:24,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:24,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:24,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:37:24,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2021-12-07 01:37:24,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078019902] [2021-12-07 01:37:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:24,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:24,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:24,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078019902] [2021-12-07 01:37:24,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078019902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:24,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:24,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:24,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70109852] [2021-12-07 01:37:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:24,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:24,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:24,736 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.5) 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) [2021-12-07 01:37:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:24,788 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-12-07 01:37:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:37:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) 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 [2021-12-07 01:37:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:24,790 INFO L225 Difference]: With dead ends: 99 [2021-12-07 01:37:24,790 INFO L226 Difference]: Without dead ends: 99 [2021-12-07 01:37:24,790 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 [2021-12-07 01:37:24,791 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:24,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-07 01:37:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2021-12-07 01:37:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-12-07 01:37:24,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2021-12-07 01:37:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:24,794 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-12-07 01:37:24,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) 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) [2021-12-07 01:37:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-12-07 01:37:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 01:37:24,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:24,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:24,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 01:37:24,795 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2021-12-07 01:37:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31069702] [2021-12-07 01:37:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:24,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:24,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31069702] [2021-12-07 01:37:24,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31069702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:24,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534922104] [2021-12-07 01:37:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:24,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:24,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:24,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:37:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:24,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:37:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:24,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:24,983 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 [2021-12-07 01:37:24,987 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 [2021-12-07 01:37:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:25,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:25,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:25,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534922104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:25,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:25,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-12-07 01:37:25,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93189142] [2021-12-07 01:37:25,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:25,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:37:25,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:37:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:37:25,166 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:25,330 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2021-12-07 01:37:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:37:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-07 01:37:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:25,332 INFO L225 Difference]: With dead ends: 92 [2021-12-07 01:37:25,332 INFO L226 Difference]: Without dead ends: 92 [2021-12-07 01:37:25,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:37:25,333 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 552 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:25,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 116 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-07 01:37:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-12-07 01:37:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 64 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) [2021-12-07 01:37:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2021-12-07 01:37:25,337 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 15 [2021-12-07 01:37:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:25,337 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2021-12-07 01:37:25,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2021-12-07 01:37:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:37:25,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:25,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:25,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:37:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:37:25,539 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2021-12-07 01:37:25,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:25,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167021409] [2021-12-07 01:37:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:25,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167021409] [2021-12-07 01:37:25,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167021409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:25,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:25,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:25,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36166054] [2021-12-07 01:37:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:25,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:25,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:25,568 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2021-12-07 01:37:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:25,596 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-12-07 01:37:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:37:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 [2021-12-07 01:37:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:25,596 INFO L225 Difference]: With dead ends: 66 [2021-12-07 01:37:25,597 INFO L226 Difference]: Without dead ends: 66 [2021-12-07 01:37:25,597 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 [2021-12-07 01:37:25,597 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:25,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-07 01:37:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-12-07 01:37:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-12-07 01:37:25,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 17 [2021-12-07 01:37:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:25,600 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-12-07 01:37:25,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2021-12-07 01:37:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-12-07 01:37:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:37:25,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:25,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:25,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:37:25,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:25,602 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2021-12-07 01:37:25,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:25,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510299721] [2021-12-07 01:37:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:25,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:25,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:25,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510299721] [2021-12-07 01:37:25,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510299721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:25,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:25,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:37:25,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271640456] [2021-12-07 01:37:25,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:25,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:37:25,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:37:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:37:25,660 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-12-07 01:37:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:25,709 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-12-07 01:37:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:37:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-12-07 01:37:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:25,711 INFO L225 Difference]: With dead ends: 87 [2021-12-07 01:37:25,711 INFO L226 Difference]: Without dead ends: 87 [2021-12-07 01:37:25,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:37:25,712 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:25,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 84 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-07 01:37:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-12-07 01:37:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2021-12-07 01:37:25,715 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 17 [2021-12-07 01:37:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:25,715 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2021-12-07 01:37:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-12-07 01:37:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2021-12-07 01:37:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:37:25,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:25,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:25,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 01:37:25,717 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2021-12-07 01:37:25,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:25,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655209648] [2021-12-07 01:37:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:25,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:25,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655209648] [2021-12-07 01:37:25,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655209648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:25,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:25,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:37:25,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903545696] [2021-12-07 01:37:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:25,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:37:25,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:37:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:37:25,814 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-07 01:37:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:25,996 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2021-12-07 01:37:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:37:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2021-12-07 01:37:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:25,997 INFO L225 Difference]: With dead ends: 151 [2021-12-07 01:37:25,997 INFO L226 Difference]: Without dead ends: 151 [2021-12-07 01:37:25,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:37:25,998 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:25,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-07 01:37:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2021-12-07 01:37:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-12-07 01:37:26,001 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 17 [2021-12-07 01:37:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:26,001 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-12-07 01:37:26,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-07 01:37:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-12-07 01:37:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:37:26,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:26,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:26,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:37:26,002 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2021-12-07 01:37:26,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054558083] [2021-12-07 01:37:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:26,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054558083] [2021-12-07 01:37:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054558083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825964583] [2021-12-07 01:37:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:26,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:26,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:26,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:37:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:37:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825964583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:26,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:26,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-07 01:37:26,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100030349] [2021-12-07 01:37:26,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:26,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:37:26,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:37:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:37:26,179 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:26,305 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2021-12-07 01:37:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:37:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-07 01:37:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:26,307 INFO L225 Difference]: With dead ends: 278 [2021-12-07 01:37:26,307 INFO L226 Difference]: Without dead ends: 278 [2021-12-07 01:37:26,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:37:26,308 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 502 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:26,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 279 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-07 01:37:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 90. [2021-12-07 01:37:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.369047619047619) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-12-07 01:37:26,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 18 [2021-12-07 01:37:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:26,311 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-12-07 01:37:26,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-12-07 01:37:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 01:37:26,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:26,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:26,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:37:26,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:37:26,514 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash -440236817, now seen corresponding path program 1 times [2021-12-07 01:37:26,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:26,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801871464] [2021-12-07 01:37:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:26,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801871464] [2021-12-07 01:37:26,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801871464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:26,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744814136] [2021-12-07 01:37:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:26,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:26,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:37:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-07 01:37:26,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:26,762 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 [2021-12-07 01:37:26,765 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 [2021-12-07 01:37:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:26,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:26,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744814136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:26,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:26,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-12-07 01:37:26,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692306272] [2021-12-07 01:37:26,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:37:26,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:37:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:37:26,977 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:27,212 INFO L93 Difference]: Finished difference Result 182 states and 231 transitions. [2021-12-07 01:37:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:37:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 01:37:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:27,213 INFO L225 Difference]: With dead ends: 182 [2021-12-07 01:37:27,213 INFO L226 Difference]: Without dead ends: 182 [2021-12-07 01:37:27,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:37:27,214 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 563 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:27,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 437 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-07 01:37:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 102. [2021-12-07 01:37:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-12-07 01:37:27,217 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 21 [2021-12-07 01:37:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:27,217 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-12-07 01:37:27,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-12-07 01:37:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 01:37:27,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:27,218 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] [2021-12-07 01:37:27,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:37:27,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:27,419 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2021-12-07 01:37:27,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:27,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657994821] [2021-12-07 01:37:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:27,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:27,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:27,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657994821] [2021-12-07 01:37:27,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657994821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:27,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:27,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:37:27,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671294976] [2021-12-07 01:37:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:27,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:27,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:27,444 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:27,468 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-12-07 01:37:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:37:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-07 01:37:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:27,469 INFO L225 Difference]: With dead ends: 108 [2021-12-07 01:37:27,469 INFO L226 Difference]: Without dead ends: 108 [2021-12-07 01:37:27,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:37:27,470 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:27,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-07 01:37:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2021-12-07 01:37:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2021-12-07 01:37:27,472 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2021-12-07 01:37:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:27,472 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2021-12-07 01:37:27,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2021-12-07 01:37:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 01:37:27,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:27,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:27,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 01:37:27,473 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2021-12-07 01:37:27,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:27,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407157715] [2021-12-07 01:37:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:27,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:27,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407157715] [2021-12-07 01:37:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407157715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161403727] [2021-12-07 01:37:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:27,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:27,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:37:27,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:37:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:27,575 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:27,575 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 [2021-12-07 01:37:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161403727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:27,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-07 01:37:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778450614] [2021-12-07 01:37:27,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:27,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:37:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:37:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:37:27,807 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:27,911 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2021-12-07 01:37:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:37:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 22 [2021-12-07 01:37:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:27,912 INFO L225 Difference]: With dead ends: 200 [2021-12-07 01:37:27,912 INFO L226 Difference]: Without dead ends: 200 [2021-12-07 01:37:27,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:37:27,913 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 174 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:27,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 158 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-07 01:37:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2021-12-07 01:37:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-12-07 01:37:27,915 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2021-12-07 01:37:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:27,915 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-12-07 01:37:27,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2021-12-07 01:37:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:37:27,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:27,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:27,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:37:28,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:28,117 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2021-12-07 01:37:28,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:28,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883183418] [2021-12-07 01:37:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:28,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:28,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883183418] [2021-12-07 01:37:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883183418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208589594] [2021-12-07 01:37:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:28,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:28,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:37:28,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:37:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:28,442 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 [2021-12-07 01:37:28,521 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 17 treesize of output 13 [2021-12-07 01:37:28,568 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 20 treesize of output 22 [2021-12-07 01:37:28,671 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-07 01:37:28,671 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 10 [2021-12-07 01:37:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:28,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:28,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_240 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_240) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-07 01:37:28,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:28,747 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 26 treesize of output 27 [2021-12-07 01:37:28,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:28,752 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 40 treesize of output 40 [2021-12-07 01:37:28,755 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 [2021-12-07 01:37:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:28,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208589594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:28,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:28,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2021-12-07 01:37:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814165846] [2021-12-07 01:37:28,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:28,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:37:28,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:37:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2021-12-07 01:37:28,862 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:29,115 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2021-12-07 01:37:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:37:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-07 01:37:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:29,117 INFO L225 Difference]: With dead ends: 193 [2021-12-07 01:37:29,117 INFO L226 Difference]: Without dead ends: 193 [2021-12-07 01:37:29,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=889, Unknown=1, NotChecked=62, Total=1122 [2021-12-07 01:37:29,118 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 227 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 427 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 225 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2021-12-07 01:37:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-07 01:37:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 103. [2021-12-07 01:37:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 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) [2021-12-07 01:37:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2021-12-07 01:37:29,123 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2021-12-07 01:37:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:29,123 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2021-12-07 01:37:29,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2021-12-07 01:37:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:37:29,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:29,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:29,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:37:29,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:29,325 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2021-12-07 01:37:29,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074260844] [2021-12-07 01:37:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:29,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074260844] [2021-12-07 01:37:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074260844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931169323] [2021-12-07 01:37:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:29,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:29,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:29,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:37:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:37:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:29,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:29,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931169323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:29,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:29,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-12-07 01:37:29,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177771423] [2021-12-07 01:37:29,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:29,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:37:29,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:37:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:37:29,512 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:29,552 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2021-12-07 01:37:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:37:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-07 01:37:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:29,553 INFO L225 Difference]: With dead ends: 205 [2021-12-07 01:37:29,553 INFO L226 Difference]: Without dead ends: 205 [2021-12-07 01:37:29,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:37:29,554 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:29,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-07 01:37:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-12-07 01:37:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2021-12-07 01:37:29,560 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2021-12-07 01:37:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:29,560 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2021-12-07 01:37:29,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2021-12-07 01:37:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:37:29,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:29,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:29,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:37:29,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:37:29,763 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:29,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2021-12-07 01:37:29,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965471040] [2021-12-07 01:37:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:29,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:29,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965471040] [2021-12-07 01:37:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965471040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:29,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:29,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 01:37:29,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969901531] [2021-12-07 01:37:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:29,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:37:29,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:37:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:37:29,945 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:30,018 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2021-12-07 01:37:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:37:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-07 01:37:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:30,019 INFO L225 Difference]: With dead ends: 260 [2021-12-07 01:37:30,019 INFO L226 Difference]: Without dead ends: 260 [2021-12-07 01:37:30,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:37:30,020 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:30,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 219 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-07 01:37:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2021-12-07 01:37:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2021-12-07 01:37:30,024 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2021-12-07 01:37:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:30,024 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2021-12-07 01:37:30,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2021-12-07 01:37:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 01:37:30,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:30,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:30,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 01:37:30,025 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2021-12-07 01:37:30,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764870231] [2021-12-07 01:37:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:30,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:30,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:30,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764870231] [2021-12-07 01:37:30,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764870231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:30,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:30,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 01:37:30,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593492036] [2021-12-07 01:37:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:30,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:37:30,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:37:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:37:30,103 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:30,193 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2021-12-07 01:37:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:37:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-07 01:37:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:30,194 INFO L225 Difference]: With dead ends: 223 [2021-12-07 01:37:30,194 INFO L226 Difference]: Without dead ends: 223 [2021-12-07 01:37:30,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:37:30,195 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:30,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 211 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-07 01:37:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2021-12-07 01:37:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2021-12-07 01:37:30,199 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2021-12-07 01:37:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:30,199 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2021-12-07 01:37:30,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2021-12-07 01:37:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:37:30,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:30,200 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] [2021-12-07 01:37:30,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 01:37:30,200 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2021-12-07 01:37:30,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:30,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649603134] [2021-12-07 01:37:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:30,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:30,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649603134] [2021-12-07 01:37:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649603134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:30,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:30,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:37:30,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375821280] [2021-12-07 01:37:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:30,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:37:30,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:37:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:37:30,264 INFO L87 Difference]: Start difference. First operand 181 states and 221 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) [2021-12-07 01:37:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:30,282 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-12-07 01:37:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:37:30,283 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 [2021-12-07 01:37:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:30,284 INFO L225 Difference]: With dead ends: 180 [2021-12-07 01:37:30,284 INFO L226 Difference]: Without dead ends: 133 [2021-12-07 01:37:30,284 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 [2021-12-07 01:37:30,284 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:30,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-07 01:37:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-07 01:37:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-12-07 01:37:30,287 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2021-12-07 01:37:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-12-07 01:37:30,288 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) [2021-12-07 01:37:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-12-07 01:37:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 01:37:30,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:30,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:30,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-07 01:37:30,288 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2021-12-07 01:37:30,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598860336] [2021-12-07 01:37:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:30,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:30,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598860336] [2021-12-07 01:37:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598860336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988820823] [2021-12-07 01:37:30,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:37:30,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:30,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:30,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:37:30,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:37:30,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:30,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 01:37:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:30,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:30,471 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 [2021-12-07 01:37:30,475 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 [2021-12-07 01:37:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:30,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:30,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988820823] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:30,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-12-07 01:37:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298340013] [2021-12-07 01:37:30,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:37:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:37:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:37:30,819 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 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) [2021-12-07 01:37:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:31,152 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2021-12-07 01:37:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:37:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 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 [2021-12-07 01:37:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:31,154 INFO L225 Difference]: With dead ends: 208 [2021-12-07 01:37:31,154 INFO L226 Difference]: Without dead ends: 198 [2021-12-07 01:37:31,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 01:37:31,155 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 237 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:31,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 403 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:37:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-07 01:37:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2021-12-07 01:37:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) 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) [2021-12-07 01:37:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-12-07 01:37:31,161 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2021-12-07 01:37:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:31,161 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-12-07 01:37:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 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) [2021-12-07 01:37:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-12-07 01:37:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 01:37:31,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:31,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:31,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:37:31,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:37:31,363 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2021-12-07 01:37:31,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:31,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032889633] [2021-12-07 01:37:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:31,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:31,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032889633] [2021-12-07 01:37:31,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032889633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:37:31,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:37:31,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 01:37:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552739498] [2021-12-07 01:37:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:37:31,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:37:31,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:31,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:37:31,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:37:31,435 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:31,529 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-12-07 01:37:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:37:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-07 01:37:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:31,530 INFO L225 Difference]: With dead ends: 218 [2021-12-07 01:37:31,530 INFO L226 Difference]: Without dead ends: 181 [2021-12-07 01:37:31,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:37:31,530 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:31,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 198 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:37:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-07 01:37:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-12-07 01:37:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2021-12-07 01:37:31,533 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2021-12-07 01:37:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:31,533 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2021-12-07 01:37:31,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2021-12-07 01:37:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:37:31,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:31,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:31,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-07 01:37:31,534 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2021-12-07 01:37:31,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:31,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728052416] [2021-12-07 01:37:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:31,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:31,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728052416] [2021-12-07 01:37:31,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728052416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453603376] [2021-12-07 01:37:31,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:37:31,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:31,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:31,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:37:31,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:37:31,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:37:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:31,737 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 [2021-12-07 01:37:31,868 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 17 treesize of output 13 [2021-12-07 01:37:31,904 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 20 treesize of output 22 [2021-12-07 01:37:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:32,251 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-12-07 01:37:32,251 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 6 case distinctions, treesize of input 41 treesize of output 35 [2021-12-07 01:37:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:32,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:32,425 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~s~0#1.offset_43| Int) (v_ArrVal_370 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |v_ULTIMATE.start_cstrncat_~s~0#1.offset_43|) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_43| 2)) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_43| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~s~0#1.offset_43|) (< |v_ULTIMATE.start_cstrncat_~s~0#1.offset_43| 0)))) is different from false [2021-12-07 01:37:32,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:32,438 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 77 treesize of output 49 [2021-12-07 01:37:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:32,451 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 6 case distinctions, treesize of input 86 treesize of output 106 [2021-12-07 01:37:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:32,460 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 32 treesize of output 22 [2021-12-07 01:37:32,980 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 [2021-12-07 01:37:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:32,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453603376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:32,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:32,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2021-12-07 01:37:32,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337388658] [2021-12-07 01:37:32,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:32,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:37:32,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:37:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=930, Unknown=1, NotChecked=62, Total=1122 [2021-12-07 01:37:32,999 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:33,528 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2021-12-07 01:37:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:37:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-07 01:37:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:33,529 INFO L225 Difference]: With dead ends: 212 [2021-12-07 01:37:33,529 INFO L226 Difference]: Without dead ends: 186 [2021-12-07 01:37:33,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=1932, Unknown=1, NotChecked=92, Total=2352 [2021-12-07 01:37:33,530 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:33,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 344 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 332 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2021-12-07 01:37:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-07 01:37:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 173. [2021-12-07 01:37:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2021-12-07 01:37:33,533 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2021-12-07 01:37:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:33,533 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2021-12-07 01:37:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2021-12-07 01:37:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-07 01:37:33,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:33,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:33,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:37:33,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:37:33,736 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2021-12-07 01:37:33,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:33,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014790920] [2021-12-07 01:37:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:33,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:33,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014790920] [2021-12-07 01:37:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014790920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138650868] [2021-12-07 01:37:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:33,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:33,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:37:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:37:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:34,081 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 [2021-12-07 01:37:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:34,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138650868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:34,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:34,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-12-07 01:37:34,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135417378] [2021-12-07 01:37:34,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:34,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:37:34,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:37:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:37:34,099 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:34,267 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2021-12-07 01:37:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:37:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-07 01:37:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:34,269 INFO L225 Difference]: With dead ends: 212 [2021-12-07 01:37:34,269 INFO L226 Difference]: Without dead ends: 212 [2021-12-07 01:37:34,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:37:34,270 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:34,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 260 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-07 01:37:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2021-12-07 01:37:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 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) [2021-12-07 01:37:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2021-12-07 01:37:34,273 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2021-12-07 01:37:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:34,273 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2021-12-07 01:37:34,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2021-12-07 01:37:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:37:34,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:34,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:34,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:37:34,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:34,474 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2021-12-07 01:37:34,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:34,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944677230] [2021-12-07 01:37:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:34,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:34,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944677230] [2021-12-07 01:37:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944677230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344747355] [2021-12-07 01:37:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:37:34,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:34,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:34,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:37:34,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 01:37:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 01:37:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:34,665 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:34,665 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 [2021-12-07 01:37:34,785 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 17 treesize of output 13 [2021-12-07 01:37:34,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:34,826 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-07 01:37:34,840 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 3 [2021-12-07 01:37:35,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:35,343 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2021-12-07 01:37:35,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:37:35,349 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 11 treesize of output 11 [2021-12-07 01:37:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:35,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:35,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:35,596 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 26 treesize of output 27 [2021-12-07 01:37:35,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:35,600 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 40 treesize of output 40 [2021-12-07 01:37:35,604 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 [2021-12-07 01:37:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344747355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:36,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:36,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2021-12-07 01:37:36,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473164093] [2021-12-07 01:37:36,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:36,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-07 01:37:36,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-07 01:37:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1609, Unknown=1, NotChecked=0, Total=1722 [2021-12-07 01:37:36,069 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-07 01:37:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:37,249 INFO L93 Difference]: Finished difference Result 355 states and 387 transitions. [2021-12-07 01:37:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 01:37:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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 33 [2021-12-07 01:37:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:37,250 INFO L225 Difference]: With dead ends: 355 [2021-12-07 01:37:37,250 INFO L226 Difference]: Without dead ends: 332 [2021-12-07 01:37:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=401, Invalid=4154, Unknown=1, NotChecked=0, Total=4556 [2021-12-07 01:37:37,252 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 340 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 811 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:37,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 1486 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1217 Invalid, 0 Unknown, 811 Unchecked, 0.3s Time] [2021-12-07 01:37:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-07 01:37:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 216. [2021-12-07 01:37:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.1462264150943395) internal successors, (243), 215 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 243 transitions. [2021-12-07 01:37:37,256 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 243 transitions. Word has length 33 [2021-12-07 01:37:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 243 transitions. [2021-12-07 01:37:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-07 01:37:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 243 transitions. [2021-12-07 01:37:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 01:37:37,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:37,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:37,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:37:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:37,458 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash 681817330, now seen corresponding path program 1 times [2021-12-07 01:37:37,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:37,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987391230] [2021-12-07 01:37:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:37,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987391230] [2021-12-07 01:37:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987391230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402449225] [2021-12-07 01:37:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:37,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:37,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:37,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:37:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:37,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:37:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:37,691 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 [2021-12-07 01:37:37,802 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 17 treesize of output 13 [2021-12-07 01:37:37,837 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 20 treesize of output 22 [2021-12-07 01:37:37,915 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 [2021-12-07 01:37:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:37,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:37,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_470 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_470) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-07 01:37:37,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:37,961 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 26 treesize of output 27 [2021-12-07 01:37:37,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:37,965 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 40 treesize of output 40 [2021-12-07 01:37:37,968 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 [2021-12-07 01:37:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402449225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:38,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2021-12-07 01:37:38,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735145181] [2021-12-07 01:37:38,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:38,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 01:37:38,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 01:37:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=621, Unknown=1, NotChecked=50, Total=756 [2021-12-07 01:37:38,087 INFO L87 Difference]: Start difference. First operand 216 states and 243 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:38,398 INFO L93 Difference]: Finished difference Result 403 states and 441 transitions. [2021-12-07 01:37:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:37:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-07 01:37:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:38,400 INFO L225 Difference]: With dead ends: 403 [2021-12-07 01:37:38,400 INFO L226 Difference]: Without dead ends: 375 [2021-12-07 01:37:38,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=987, Unknown=1, NotChecked=64, Total=1190 [2021-12-07 01:37:38,401 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 144 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:38,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 923 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 601 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2021-12-07 01:37:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-07 01:37:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 235. [2021-12-07 01:37:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.147186147186147) internal successors, (265), 234 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2021-12-07 01:37:38,406 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 35 [2021-12-07 01:37:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:38,406 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2021-12-07 01:37:38,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2021-12-07 01:37:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:37:38,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:38,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:38,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:37:38,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-07 01:37:38,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2021-12-07 01:37:38,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529773753] [2021-12-07 01:37:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:38,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:39,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529773753] [2021-12-07 01:37:39,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529773753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972531848] [2021-12-07 01:37:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:39,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:39,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:39,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:37:39,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-07 01:37:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:39,125 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 [2021-12-07 01:37:39,330 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-07 01:37:39,330 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 [2021-12-07 01:37:39,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:39,354 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 48 treesize of output 38 [2021-12-07 01:37:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:39,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:39,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:39,580 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 29 treesize of output 23 [2021-12-07 01:37:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:39,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:40,288 INFO L354 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2021-12-07 01:37:40,289 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2021-12-07 01:37:40,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:40,296 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 49 treesize of output 51 [2021-12-07 01:37:40,301 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 [2021-12-07 01:37:40,344 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 6 treesize of output 4 [2021-12-07 01:37:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:40,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:40,355 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 77 [2021-12-07 01:37:40,385 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 15 treesize of output 11 [2021-12-07 01:37:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972531848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:40,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:40,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-12-07 01:37:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285785143] [2021-12-07 01:37:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:40,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 01:37:40,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 01:37:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2375, Unknown=5, NotChecked=0, Total=2652 [2021-12-07 01:37:40,546 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:41,448 INFO L93 Difference]: Finished difference Result 278 states and 308 transitions. [2021-12-07 01:37:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:37:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-07 01:37:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:41,449 INFO L225 Difference]: With dead ends: 278 [2021-12-07 01:37:41,449 INFO L226 Difference]: Without dead ends: 266 [2021-12-07 01:37:41,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=575, Invalid=4970, Unknown=5, NotChecked=0, Total=5550 [2021-12-07 01:37:41,451 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:41,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 408 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 357 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2021-12-07 01:37:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-07 01:37:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 236. [2021-12-07 01:37:41,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.146551724137931) internal successors, (266), 235 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2021-12-07 01:37:41,455 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 37 [2021-12-07 01:37:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:41,455 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2021-12-07 01:37:41,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2021-12-07 01:37:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 01:37:41,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:41,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:41,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:37:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:41,657 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 6 times [2021-12-07 01:37:41,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:41,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780563324] [2021-12-07 01:37:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:41,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:41,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780563324] [2021-12-07 01:37:41,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780563324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459902231] [2021-12-07 01:37:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:37:41,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:41,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:41,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:37:41,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-07 01:37:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 01:37:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:41,875 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 [2021-12-07 01:37:41,877 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 [2021-12-07 01:37:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:42,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459902231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:42,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:42,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-12-07 01:37:42,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890218007] [2021-12-07 01:37:42,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 01:37:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 01:37:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 01:37:42,437 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:43,110 INFO L93 Difference]: Finished difference Result 415 states and 452 transitions. [2021-12-07 01:37:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:37:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-07 01:37:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:43,112 INFO L225 Difference]: With dead ends: 415 [2021-12-07 01:37:43,112 INFO L226 Difference]: Without dead ends: 405 [2021-12-07 01:37:43,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2021-12-07 01:37:43,113 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 502 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:43,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 619 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:37:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-07 01:37:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 263. [2021-12-07 01:37:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.138996138996139) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2021-12-07 01:37:43,117 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 39 [2021-12-07 01:37:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:43,118 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2021-12-07 01:37:43,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2021-12-07 01:37:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 01:37:43,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:43,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:43,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:37:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 01:37:43,320 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2021-12-07 01:37:43,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753512916] [2021-12-07 01:37:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:43,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:37:43,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:43,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753512916] [2021-12-07 01:37:43,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753512916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:43,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877447430] [2021-12-07 01:37:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:43,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:43,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:43,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:37:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:37:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:43,777 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 [2021-12-07 01:37:43,948 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:43,948 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-07 01:37:43,951 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 8 treesize of output 3 [2021-12-07 01:37:44,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:44,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:44,112 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 24 treesize of output 14 [2021-12-07 01:37:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:44,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:44,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:44,381 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 19 treesize of output 23 [2021-12-07 01:37:44,538 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_~s~0#1.base| Int)) (or (and (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (forall ((v_ArrVal_582 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_582) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)))) is different from false [2021-12-07 01:37:44,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:44,830 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 [2021-12-07 01:37:44,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:44,835 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 [2021-12-07 01:37:44,837 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 [2021-12-07 01:37:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-07 01:37:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877447430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:45,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:45,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 53 [2021-12-07 01:37:45,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463099112] [2021-12-07 01:37:45,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:45,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 01:37:45,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 01:37:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2463, Unknown=2, NotChecked=100, Total=2756 [2021-12-07 01:37:45,078 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 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) [2021-12-07 01:37:45,645 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (not (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) 1) 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 2))) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2))) (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) (<= 1 |c_ULTIMATE.start_cstrncat_~s2#1.offset|) (forall ((|ULTIMATE.start_cstrncat_~s~0#1.base| Int)) (or (and (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |ULTIMATE.start_cstrncat_~s~0#1.base|)) (forall ((v_ArrVal_582 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_582) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0))))) is different from false [2021-12-07 01:37:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:45,824 INFO L93 Difference]: Finished difference Result 277 states and 308 transitions. [2021-12-07 01:37:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:37:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 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 39 [2021-12-07 01:37:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:45,825 INFO L225 Difference]: With dead ends: 277 [2021-12-07 01:37:45,825 INFO L226 Difference]: Without dead ends: 252 [2021-12-07 01:37:45,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=421, Invalid=4554, Unknown=3, NotChecked=278, Total=5256 [2021-12-07 01:37:45,827 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 481 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 363 Invalid, 0 Unknown, 245 Unchecked, 0.1s Time] [2021-12-07 01:37:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-07 01:37:45,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-12-07 01:37:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1411290322580645) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-12-07 01:37:45,830 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 39 [2021-12-07 01:37:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:45,831 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-12-07 01:37:45,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 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) [2021-12-07 01:37:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-12-07 01:37:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:37:45,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:45,831 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:45,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:37:46,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-07 01:37:46,033 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 7 times [2021-12-07 01:37:46,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:46,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413573933] [2021-12-07 01:37:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:46,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:46,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:46,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413573933] [2021-12-07 01:37:46,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413573933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:46,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111476649] [2021-12-07 01:37:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:37:46,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:46,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:37:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:37:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:46,287 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 [2021-12-07 01:37:46,428 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 17 treesize of output 13 [2021-12-07 01:37:46,469 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 20 treesize of output 22 [2021-12-07 01:37:46,553 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 [2021-12-07 01:37:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:46,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:46,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_621 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_621) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-07 01:37:46,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:46,609 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 26 treesize of output 27 [2021-12-07 01:37:46,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:46,613 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 40 treesize of output 40 [2021-12-07 01:37:46,616 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 [2021-12-07 01:37:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:46,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111476649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:46,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:46,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2021-12-07 01:37:46,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087650310] [2021-12-07 01:37:46,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:46,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 01:37:46,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 01:37:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2021-12-07 01:37:46,746 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:47,183 INFO L93 Difference]: Finished difference Result 473 states and 517 transitions. [2021-12-07 01:37:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:37:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-07 01:37:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:47,185 INFO L225 Difference]: With dead ends: 473 [2021-12-07 01:37:47,185 INFO L226 Difference]: Without dead ends: 439 [2021-12-07 01:37:47,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1542, Unknown=1, NotChecked=80, Total=1806 [2021-12-07 01:37:47,186 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 194 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:47,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1162 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 888 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2021-12-07 01:37:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-07 01:37:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 277. [2021-12-07 01:37:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 273 states have (on average 1.1428571428571428) internal successors, (312), 276 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 312 transitions. [2021-12-07 01:37:47,190 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 312 transitions. Word has length 41 [2021-12-07 01:37:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 312 transitions. [2021-12-07 01:37:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 312 transitions. [2021-12-07 01:37:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:37:47,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:47,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:47,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:37:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:37:47,392 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2021-12-07 01:37:47,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030816575] [2021-12-07 01:37:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:47,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:37:47,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030816575] [2021-12-07 01:37:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030816575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732451732] [2021-12-07 01:37:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:47,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:47,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:47,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:37:47,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:37:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:47,635 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 [2021-12-07 01:37:47,733 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 14 treesize of output 10 [2021-12-07 01:37:47,944 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 17 treesize of output 19 [2021-12-07 01:37:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:48,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:48,063 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 [2021-12-07 01:37:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:37:48,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:48,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_663 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_663) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-12-07 01:37:48,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_663 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| Int)) (or (< |c_ULTIMATE.start_cstrncat_~s2#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_663) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| 1)) 0) (< |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| 0))) is different from false [2021-12-07 01:37:48,143 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_663 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| Int)) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_663) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| 1)) 0) (< |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_40| 0))) is different from false [2021-12-07 01:37:48,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:48,148 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 [2021-12-07 01:37:48,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:48,153 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 [2021-12-07 01:37:48,156 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 [2021-12-07 01:37:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2021-12-07 01:37:48,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732451732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:48,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:48,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2021-12-07 01:37:48,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385410027] [2021-12-07 01:37:48,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:37:48,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:37:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=876, Unknown=3, NotChecked=186, Total=1190 [2021-12-07 01:37:48,370 INFO L87 Difference]: Start difference. First operand 277 states and 312 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 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) [2021-12-07 01:37:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:48,613 INFO L93 Difference]: Finished difference Result 472 states and 520 transitions. [2021-12-07 01:37:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:37:48,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 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) Word has length 43 [2021-12-07 01:37:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:48,614 INFO L225 Difference]: With dead ends: 472 [2021-12-07 01:37:48,615 INFO L226 Difference]: Without dead ends: 365 [2021-12-07 01:37:48,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1577, Unknown=3, NotChecked=252, Total=2070 [2021-12-07 01:37:48,615 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:48,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 408 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 0 Unknown, 283 Unchecked, 0.1s Time] [2021-12-07 01:37:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-07 01:37:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 319. [2021-12-07 01:37:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 315 states have (on average 1.1365079365079365) internal successors, (358), 318 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 358 transitions. [2021-12-07 01:37:48,620 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 358 transitions. Word has length 43 [2021-12-07 01:37:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:48,620 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 358 transitions. [2021-12-07 01:37:48,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 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) [2021-12-07 01:37:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 358 transitions. [2021-12-07 01:37:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:37:48,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:48,621 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:48,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:37:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 01:37:48,822 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:48,823 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 8 times [2021-12-07 01:37:48,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:48,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469043588] [2021-12-07 01:37:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:48,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:49,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469043588] [2021-12-07 01:37:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469043588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878397089] [2021-12-07 01:37:49,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:49,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:49,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:49,001 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:49,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:37:49,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 01:37:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:49,088 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 [2021-12-07 01:37:49,090 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 [2021-12-07 01:37:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:49,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878397089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:49,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:49,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2021-12-07 01:37:49,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108029119] [2021-12-07 01:37:49,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:49,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:37:49,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:37:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:37:49,709 INFO L87 Difference]: Start difference. First operand 319 states and 358 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:50,532 INFO L93 Difference]: Finished difference Result 571 states and 623 transitions. [2021-12-07 01:37:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:37:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-12-07 01:37:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:50,534 INFO L225 Difference]: With dead ends: 571 [2021-12-07 01:37:50,535 INFO L226 Difference]: Without dead ends: 551 [2021-12-07 01:37:50,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=3066, Unknown=0, NotChecked=0, Total=3782 [2021-12-07 01:37:50,536 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 698 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:50,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1057 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:37:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-12-07 01:37:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 348. [2021-12-07 01:37:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2021-12-07 01:37:50,541 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 45 [2021-12-07 01:37:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:50,542 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2021-12-07 01:37:50,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2021-12-07 01:37:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:37:50,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:50,542 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:50,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:37:50,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:50,743 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 9 times [2021-12-07 01:37:50,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:50,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204015913] [2021-12-07 01:37:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:50,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:50,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204015913] [2021-12-07 01:37:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204015913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939454190] [2021-12-07 01:37:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:37:50,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:50,967 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:50,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:37:51,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-07 01:37:51,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 01:37:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:51,058 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 [2021-12-07 01:37:51,232 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 17 treesize of output 13 [2021-12-07 01:37:51,268 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 20 treesize of output 22 [2021-12-07 01:37:51,368 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 [2021-12-07 01:37:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:51,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:51,422 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_746) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)))) is different from false [2021-12-07 01:37:51,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:51,425 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 26 treesize of output 27 [2021-12-07 01:37:51,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:51,429 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 40 treesize of output 40 [2021-12-07 01:37:51,431 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 [2021-12-07 01:37:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:37:51,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939454190] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:51,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 34 [2021-12-07 01:37:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782419773] [2021-12-07 01:37:51,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:51,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:37:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:37:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=961, Unknown=1, NotChecked=62, Total=1122 [2021-12-07 01:37:51,579 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:52,067 INFO L93 Difference]: Finished difference Result 678 states and 738 transitions. [2021-12-07 01:37:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:37:52,067 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-12-07 01:37:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:52,069 INFO L225 Difference]: With dead ends: 678 [2021-12-07 01:37:52,069 INFO L226 Difference]: Without dead ends: 625 [2021-12-07 01:37:52,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=1563, Unknown=1, NotChecked=80, Total=1806 [2021-12-07 01:37:52,070 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 210 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:52,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1543 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1196 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2021-12-07 01:37:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-07 01:37:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 377. [2021-12-07 01:37:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2021-12-07 01:37:52,076 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2021-12-07 01:37:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:52,076 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2021-12-07 01:37:52,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2021-12-07 01:37:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:37:52,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:52,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:52,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:37:52,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 01:37:52,278 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2021-12-07 01:37:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548528055] [2021-12-07 01:37:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:52,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:37:52,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:52,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548528055] [2021-12-07 01:37:52,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548528055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:52,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774774367] [2021-12-07 01:37:52,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:37:52,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:52,411 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:52,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:37:52,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:37:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:37:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:52,496 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:52,496 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 [2021-12-07 01:37:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:37:52,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 01:37:52,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774774367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:52,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:52,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-12-07 01:37:52,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984655522] [2021-12-07 01:37:52,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:52,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:37:52,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:37:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:37:52,875 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:53,153 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2021-12-07 01:37:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:37:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2021-12-07 01:37:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:53,155 INFO L225 Difference]: With dead ends: 501 [2021-12-07 01:37:53,155 INFO L226 Difference]: Without dead ends: 501 [2021-12-07 01:37:53,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:37:53,156 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 198 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:53,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 322 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:37:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-07 01:37:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2021-12-07 01:37:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2021-12-07 01:37:53,161 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2021-12-07 01:37:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:53,161 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2021-12-07 01:37:53,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2021-12-07 01:37:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 01:37:53,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:53,162 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:53,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:37:53,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:37:53,363 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2021-12-07 01:37:53,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142711911] [2021-12-07 01:37:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:53,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:53,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:53,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142711911] [2021-12-07 01:37:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142711911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394929887] [2021-12-07 01:37:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:53,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:53,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:53,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:53,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:37:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 01:37:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:53,607 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 [2021-12-07 01:37:53,609 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 [2021-12-07 01:37:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:53,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:54,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:37:54,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394929887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:54,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:54,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-12-07 01:37:54,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297097909] [2021-12-07 01:37:54,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:54,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 01:37:54,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 01:37:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 01:37:54,278 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) [2021-12-07 01:37:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:55,205 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2021-12-07 01:37:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:37:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) Word has length 50 [2021-12-07 01:37:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:55,207 INFO L225 Difference]: With dead ends: 626 [2021-12-07 01:37:55,207 INFO L226 Difference]: Without dead ends: 620 [2021-12-07 01:37:55,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=664, Invalid=2996, Unknown=0, NotChecked=0, Total=3660 [2021-12-07 01:37:55,208 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 568 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:55,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 410 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:37:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-07 01:37:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2021-12-07 01:37:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2021-12-07 01:37:55,214 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2021-12-07 01:37:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2021-12-07 01:37:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) [2021-12-07 01:37:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2021-12-07 01:37:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 01:37:55,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:55,215 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:55,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:37:55,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:55,416 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 10 times [2021-12-07 01:37:55,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:55,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258632394] [2021-12-07 01:37:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:55,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:55,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258632394] [2021-12-07 01:37:55,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258632394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558667489] [2021-12-07 01:37:55,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:37:55,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:55,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:55,598 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:55,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:37:55,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:37:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:55,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:37:55,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:55,697 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:37:55,698 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 [2021-12-07 01:37:55,704 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 [2021-12-07 01:37:55,856 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 [2021-12-07 01:37:55,874 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 [2021-12-07 01:37:56,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:56,024 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 19 treesize of output 19 [2021-12-07 01:37:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:37:56,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:56,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:56,623 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 24 treesize of output 25 [2021-12-07 01:37:56,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:56,627 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 36 treesize of output 36 [2021-12-07 01:37:56,630 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 9 treesize of output 7 [2021-12-07 01:37:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:37:56,912 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 [2021-12-07 01:37:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:37:56,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558667489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:56,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:56,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2021-12-07 01:37:56,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702824638] [2021-12-07 01:37:56,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:56,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:37:56,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:37:56,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 01:37:56,932 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 45 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) [2021-12-07 01:37:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:58,468 INFO L93 Difference]: Finished difference Result 943 states and 1022 transitions. [2021-12-07 01:37:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:37:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 45 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) Word has length 51 [2021-12-07 01:37:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:58,472 INFO L225 Difference]: With dead ends: 943 [2021-12-07 01:37:58,472 INFO L226 Difference]: Without dead ends: 817 [2021-12-07 01:37:58,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1333, Invalid=5977, Unknown=0, NotChecked=0, Total=7310 [2021-12-07 01:37:58,474 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 592 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:58,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1702 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1784 Invalid, 0 Unknown, 497 Unchecked, 0.6s Time] [2021-12-07 01:37:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-07 01:37:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 444. [2021-12-07 01:37:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 1.125) internal successors, (495), 443 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:37:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 495 transitions. [2021-12-07 01:37:58,483 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 495 transitions. Word has length 51 [2021-12-07 01:37:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:58,484 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 495 transitions. [2021-12-07 01:37:58,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 45 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) [2021-12-07 01:37:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 495 transitions. [2021-12-07 01:37:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 01:37:58,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:58,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:58,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:37:58,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-07 01:37:58,685 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:37:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2021-12-07 01:37:58,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:37:58,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257034615] [2021-12-07 01:37:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:37:58,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:37:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:59,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:37:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257034615] [2021-12-07 01:37:59,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257034615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345868402] [2021-12-07 01:37:59,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:37:59,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:37:59,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:37:59,060 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:37:59,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:37:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:37:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-07 01:37:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:59,162 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 [2021-12-07 01:37:59,376 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 [2021-12-07 01:37:59,447 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 14 treesize of output 16 [2021-12-07 01:37:59,506 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 14 treesize of output 16 [2021-12-07 01:37:59,563 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 [2021-12-07 01:37:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:37:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:59,580 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_937) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-12-07 01:37:59,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_937) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-12-07 01:37:59,596 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_937) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) is different from false [2021-12-07 01:37:59,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_937) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-12-07 01:37:59,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:59,607 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 [2021-12-07 01:37:59,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:37:59,610 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 [2021-12-07 01:37:59,612 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 [2021-12-07 01:37:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2021-12-07 01:37:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345868402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:59,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:37:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18] total 44 [2021-12-07 01:37:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934395374] [2021-12-07 01:37:59,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:37:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:37:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:37:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1374, Unknown=4, NotChecked=316, Total=1892 [2021-12-07 01:37:59,862 INFO L87 Difference]: Start difference. First operand 444 states and 495 transitions. Second operand has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:00,497 INFO L93 Difference]: Finished difference Result 483 states and 532 transitions. [2021-12-07 01:38:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-07 01:38:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 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 [2021-12-07 01:38:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:00,499 INFO L225 Difference]: With dead ends: 483 [2021-12-07 01:38:00,499 INFO L226 Difference]: Without dead ends: 428 [2021-12-07 01:38:00,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=410, Invalid=2682, Unknown=4, NotChecked=444, Total=3540 [2021-12-07 01:38:00,500 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:00,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 409 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 636 Invalid, 0 Unknown, 253 Unchecked, 0.2s Time] [2021-12-07 01:38:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-07 01:38:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 425. [2021-12-07 01:38:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.1211401425178147) internal successors, (472), 424 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 472 transitions. [2021-12-07 01:38:00,504 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 472 transitions. Word has length 51 [2021-12-07 01:38:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:00,505 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 472 transitions. [2021-12-07 01:38:00,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 472 transitions. [2021-12-07 01:38:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:38:00,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:00,505 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:00,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:38:00,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:00,707 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1141228712, now seen corresponding path program 1 times [2021-12-07 01:38:00,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:00,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693781361] [2021-12-07 01:38:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:00,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:00,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693781361] [2021-12-07 01:38:00,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693781361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25537392] [2021-12-07 01:38:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:00,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:00,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:00,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:38:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:38:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:01,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:01,071 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 [2021-12-07 01:38:01,294 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 17 treesize of output 13 [2021-12-07 01:38:01,343 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:01,343 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-07 01:38:01,354 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 3 [2021-12-07 01:38:02,157 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:38:02,158 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 13 treesize of output 13 [2021-12-07 01:38:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:02,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:02,276 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 10 [2021-12-07 01:38:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:02,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:02,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:02,679 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 26 treesize of output 27 [2021-12-07 01:38:02,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:02,683 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 40 treesize of output 40 [2021-12-07 01:38:02,686 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 [2021-12-07 01:38:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:03,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25537392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:03,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:03,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 60 [2021-12-07 01:38:03,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568184507] [2021-12-07 01:38:03,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:03,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-07 01:38:03,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-07 01:38:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3375, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:38:03,443 INFO L87 Difference]: Start difference. First operand 425 states and 472 transitions. Second operand has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:06,751 INFO L93 Difference]: Finished difference Result 997 states and 1077 transitions. [2021-12-07 01:38:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-07 01:38:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-07 01:38:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:06,755 INFO L225 Difference]: With dead ends: 997 [2021-12-07 01:38:06,755 INFO L226 Difference]: Without dead ends: 944 [2021-12-07 01:38:06,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=619, Invalid=9481, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 01:38:06,756 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 523 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1373 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:06,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 3262 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2388 Invalid, 0 Unknown, 1373 Unchecked, 0.7s Time] [2021-12-07 01:38:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-12-07 01:38:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 454. [2021-12-07 01:38:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1266666666666667) internal successors, (507), 453 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 507 transitions. [2021-12-07 01:38:06,762 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 507 transitions. Word has length 53 [2021-12-07 01:38:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:06,763 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 507 transitions. [2021-12-07 01:38:06,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 507 transitions. [2021-12-07 01:38:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-07 01:38:06,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:06,764 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:06,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:38:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-07 01:38:06,965 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2021-12-07 01:38:06,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84208419] [2021-12-07 01:38:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:06,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:07,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:07,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84208419] [2021-12-07 01:38:07,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84208419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882418169] [2021-12-07 01:38:07,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:38:07,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:07,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:07,374 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:07,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:38:07,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:38:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 01:38:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:07,462 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:07,463 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 [2021-12-07 01:38:07,466 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 [2021-12-07 01:38:07,632 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 14 treesize of output 10 [2021-12-07 01:38:07,781 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 16 treesize of output 18 [2021-12-07 01:38:07,857 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 16 treesize of output 18 [2021-12-07 01:38:07,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:07,938 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-07 01:38:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:07,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:08,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:08,244 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 [2021-12-07 01:38:08,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:08,249 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 [2021-12-07 01:38:08,252 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 [2021-12-07 01:38:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882418169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:08,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:08,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 16] total 49 [2021-12-07 01:38:08,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543007149] [2021-12-07 01:38:08,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:08,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:38:08,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:38:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2142, Unknown=36, NotChecked=0, Total=2352 [2021-12-07 01:38:08,697 INFO L87 Difference]: Start difference. First operand 454 states and 507 transitions. Second operand has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 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) [2021-12-07 01:38:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:09,749 INFO L93 Difference]: Finished difference Result 586 states and 645 transitions. [2021-12-07 01:38:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:38:09,749 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 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 55 [2021-12-07 01:38:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:09,751 INFO L225 Difference]: With dead ends: 586 [2021-12-07 01:38:09,751 INFO L226 Difference]: Without dead ends: 514 [2021-12-07 01:38:09,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=564, Invalid=5561, Unknown=37, NotChecked=0, Total=6162 [2021-12-07 01:38:09,752 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 128 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:09,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 573 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 701 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2021-12-07 01:38:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-07 01:38:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 499. [2021-12-07 01:38:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 495 states have (on average 1.1252525252525252) internal successors, (557), 498 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 557 transitions. [2021-12-07 01:38:09,757 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 557 transitions. Word has length 55 [2021-12-07 01:38:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 557 transitions. [2021-12-07 01:38:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 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) [2021-12-07 01:38:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 557 transitions. [2021-12-07 01:38:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 01:38:09,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:09,758 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:09,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-07 01:38:09,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 01:38:09,959 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2021-12-07 01:38:09,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72191835] [2021-12-07 01:38:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:09,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:10,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72191835] [2021-12-07 01:38:10,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72191835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183781733] [2021-12-07 01:38:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:38:10,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:10,128 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:10,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:38:10,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:38:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 01:38:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:10,215 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 [2021-12-07 01:38:10,217 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 [2021-12-07 01:38:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:10,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:11,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:11,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183781733] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:11,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:11,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2021-12-07 01:38:11,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563128463] [2021-12-07 01:38:11,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:11,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 01:38:11,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 01:38:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:38:11,081 INFO L87 Difference]: Start difference. First operand 499 states and 557 transitions. Second operand has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:12,436 INFO L93 Difference]: Finished difference Result 753 states and 819 transitions. [2021-12-07 01:38:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:38:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-07 01:38:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:12,439 INFO L225 Difference]: With dead ends: 753 [2021-12-07 01:38:12,439 INFO L226 Difference]: Without dead ends: 749 [2021-12-07 01:38:12,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=902, Invalid=4210, Unknown=0, NotChecked=0, Total=5112 [2021-12-07 01:38:12,440 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 796 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 599 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:38:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-07 01:38:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 484. [2021-12-07 01:38:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.13125) internal successors, (543), 483 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 543 transitions. [2021-12-07 01:38:12,445 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 543 transitions. Word has length 56 [2021-12-07 01:38:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:12,446 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 543 transitions. [2021-12-07 01:38:12,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 543 transitions. [2021-12-07 01:38:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:38:12,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:12,447 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:12,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-07 01:38:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:12,648 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1096357131, now seen corresponding path program 2 times [2021-12-07 01:38:12,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980238318] [2021-12-07 01:38:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:12,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:12,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980238318] [2021-12-07 01:38:12,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980238318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823870307] [2021-12-07 01:38:12,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:38:12,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:12,867 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:38:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:38:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:12,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:38:12,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:12,951 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 [2021-12-07 01:38:12,953 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 [2021-12-07 01:38:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:13,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823870307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:13,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:13,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 54 [2021-12-07 01:38:13,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159811151] [2021-12-07 01:38:13,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:13,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-07 01:38:13,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-07 01:38:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2021-12-07 01:38:13,901 INFO L87 Difference]: Start difference. First operand 484 states and 543 transitions. Second operand has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:15,040 INFO L93 Difference]: Finished difference Result 1002 states and 1088 transitions. [2021-12-07 01:38:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:38:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 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 [2021-12-07 01:38:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:15,043 INFO L225 Difference]: With dead ends: 1002 [2021-12-07 01:38:15,043 INFO L226 Difference]: Without dead ends: 990 [2021-12-07 01:38:15,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1159, Invalid=5161, Unknown=0, NotChecked=0, Total=6320 [2021-12-07 01:38:15,044 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 694 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:15,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 1374 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:38:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-07 01:38:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 532. [2021-12-07 01:38:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.125) internal successors, (594), 531 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 594 transitions. [2021-12-07 01:38:15,051 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 594 transitions. Word has length 57 [2021-12-07 01:38:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:15,051 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 594 transitions. [2021-12-07 01:38:15,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 594 transitions. [2021-12-07 01:38:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:38:15,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:15,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:15,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-07 01:38:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:15,253 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 415651818, now seen corresponding path program 4 times [2021-12-07 01:38:15,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:15,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472370205] [2021-12-07 01:38:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:15,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:38:15,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472370205] [2021-12-07 01:38:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472370205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614102204] [2021-12-07 01:38:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:38:15,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:15,550 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:15,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:38:15,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:38:15,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-07 01:38:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:15,634 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:15,635 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 [2021-12-07 01:38:15,802 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 [2021-12-07 01:38:15,968 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:15,968 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-07 01:38:15,976 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 7 treesize of output 3 [2021-12-07 01:38:16,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:16,150 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-07 01:38:16,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:16,288 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-12-07 01:38:16,333 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:38:16,333 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 16 treesize of output 14 [2021-12-07 01:38:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:16,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:17,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:17,046 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 21 treesize of output 22 [2021-12-07 01:38:17,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:17,050 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 33 treesize of output 33 [2021-12-07 01:38:17,053 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 9 treesize of output 7 [2021-12-07 01:38:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614102204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:17,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:17,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 54 [2021-12-07 01:38:17,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309776185] [2021-12-07 01:38:17,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:17,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-07 01:38:17,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-07 01:38:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2651, Unknown=7, NotChecked=0, Total=2862 [2021-12-07 01:38:17,902 INFO L87 Difference]: Start difference. First operand 532 states and 594 transitions. Second operand has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 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) [2021-12-07 01:38:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:19,115 INFO L93 Difference]: Finished difference Result 788 states and 867 transitions. [2021-12-07 01:38:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 01:38:19,116 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 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 57 [2021-12-07 01:38:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:19,118 INFO L225 Difference]: With dead ends: 788 [2021-12-07 01:38:19,118 INFO L226 Difference]: Without dead ends: 615 [2021-12-07 01:38:19,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=638, Invalid=6495, Unknown=7, NotChecked=0, Total=7140 [2021-12-07 01:38:19,119 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 130 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:19,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 646 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 477 Invalid, 0 Unknown, 292 Unchecked, 0.2s Time] [2021-12-07 01:38:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-07 01:38:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 568. [2021-12-07 01:38:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 564 states have (on average 1.124113475177305) internal successors, (634), 567 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 634 transitions. [2021-12-07 01:38:19,124 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 634 transitions. Word has length 57 [2021-12-07 01:38:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 634 transitions. [2021-12-07 01:38:19,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 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) [2021-12-07 01:38:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 634 transitions. [2021-12-07 01:38:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-07 01:38:19,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:19,125 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:19,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-07 01:38:19,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-07 01:38:19,327 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1332214770, now seen corresponding path program 3 times [2021-12-07 01:38:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:19,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381462607] [2021-12-07 01:38:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:19,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:19,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381462607] [2021-12-07 01:38:19,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381462607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383327043] [2021-12-07 01:38:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:38:19,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:19,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:19,584 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:19,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 01:38:19,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-07 01:38:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:19,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-07 01:38:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:19,722 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 [2021-12-07 01:38:19,928 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 17 treesize of output 13 [2021-12-07 01:38:19,968 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 20 treesize of output 22 [2021-12-07 01:38:20,081 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 [2021-12-07 01:38:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:20,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:20,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1248 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1248) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-07 01:38:20,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:20,146 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 26 treesize of output 27 [2021-12-07 01:38:20,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:20,149 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 40 treesize of output 40 [2021-12-07 01:38:20,151 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 [2021-12-07 01:38:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:38:20,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383327043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:20,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:20,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 40 [2021-12-07 01:38:20,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375935063] [2021-12-07 01:38:20,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:38:20,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:38:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1373, Unknown=1, NotChecked=74, Total=1560 [2021-12-07 01:38:20,332 INFO L87 Difference]: Start difference. First operand 568 states and 634 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:21,174 INFO L93 Difference]: Finished difference Result 1308 states and 1414 transitions. [2021-12-07 01:38:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:38:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2021-12-07 01:38:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:21,179 INFO L225 Difference]: With dead ends: 1308 [2021-12-07 01:38:21,179 INFO L226 Difference]: Without dead ends: 1268 [2021-12-07 01:38:21,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=2267, Unknown=1, NotChecked=96, Total=2550 [2021-12-07 01:38:21,180 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 258 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:21,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 2608 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2035 Invalid, 0 Unknown, 375 Unchecked, 0.6s Time] [2021-12-07 01:38:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-12-07 01:38:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 608. [2021-12-07 01:38:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 604 states have (on average 1.1291390728476822) internal successors, (682), 607 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 682 transitions. [2021-12-07 01:38:21,188 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 682 transitions. Word has length 59 [2021-12-07 01:38:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 682 transitions. [2021-12-07 01:38:21,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 682 transitions. [2021-12-07 01:38:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-07 01:38:21,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:21,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:21,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 01:38:21,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:21,390 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2021-12-07 01:38:21,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:21,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781180783] [2021-12-07 01:38:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:21,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:21,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781180783] [2021-12-07 01:38:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781180783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433909971] [2021-12-07 01:38:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:38:21,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:21,540 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:21,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 01:38:21,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 01:38:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:38:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:21,659 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:38:21,659 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 [2021-12-07 01:38:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:21,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:22,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433909971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:22,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:22,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2021-12-07 01:38:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325389958] [2021-12-07 01:38:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:38:22,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:38:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:38:22,097 INFO L87 Difference]: Start difference. First operand 608 states and 682 transitions. Second operand has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 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) [2021-12-07 01:38:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:22,460 INFO L93 Difference]: Finished difference Result 710 states and 774 transitions. [2021-12-07 01:38:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:38:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 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) Word has length 59 [2021-12-07 01:38:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:22,463 INFO L225 Difference]: With dead ends: 710 [2021-12-07 01:38:22,463 INFO L226 Difference]: Without dead ends: 710 [2021-12-07 01:38:22,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 01:38:22,464 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:22,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 449 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:38:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-07 01:38:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 657. [2021-12-07 01:38:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 653 states have (on average 1.119448698315467) internal successors, (731), 656 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 731 transitions. [2021-12-07 01:38:22,470 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 731 transitions. Word has length 59 [2021-12-07 01:38:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:22,470 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 731 transitions. [2021-12-07 01:38:22,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 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) [2021-12-07 01:38:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 731 transitions. [2021-12-07 01:38:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-07 01:38:22,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:22,471 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:22,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 01:38:22,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-07 01:38:22,672 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2021-12-07 01:38:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:22,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120273140] [2021-12-07 01:38:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:22,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:22,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:22,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120273140] [2021-12-07 01:38:22,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120273140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:22,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316633420] [2021-12-07 01:38:22,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:38:22,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:22,889 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:22,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 01:38:23,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:38:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 01:38:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:23,032 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 [2021-12-07 01:38:23,034 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 [2021-12-07 01:38:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:23,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316633420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:23,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:23,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-12-07 01:38:23,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313013160] [2021-12-07 01:38:23,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:23,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-07 01:38:23,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-07 01:38:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-12-07 01:38:23,964 INFO L87 Difference]: Start difference. First operand 657 states and 731 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:26,435 INFO L93 Difference]: Finished difference Result 1161 states and 1246 transitions. [2021-12-07 01:38:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:38:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 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 62 [2021-12-07 01:38:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:26,439 INFO L225 Difference]: With dead ends: 1161 [2021-12-07 01:38:26,439 INFO L226 Difference]: Without dead ends: 1128 [2021-12-07 01:38:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1827, Invalid=7875, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 01:38:26,440 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 929 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:26,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1078 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:38:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-07 01:38:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 625. [2021-12-07 01:38:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 621 states have (on average 1.1207729468599035) internal successors, (696), 624 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 696 transitions. [2021-12-07 01:38:26,447 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 696 transitions. Word has length 62 [2021-12-07 01:38:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:26,448 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 696 transitions. [2021-12-07 01:38:26,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 696 transitions. [2021-12-07 01:38:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-07 01:38:26,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:26,449 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:26,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 01:38:26,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-07 01:38:26,650 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash -705181205, now seen corresponding path program 4 times [2021-12-07 01:38:26,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312520854] [2021-12-07 01:38:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:26,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:26,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312520854] [2021-12-07 01:38:26,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312520854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:26,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620048490] [2021-12-07 01:38:26,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:38:26,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:26,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:26,958 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:26,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 01:38:27,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:38:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-07 01:38:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:27,081 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 [2021-12-07 01:38:27,084 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 [2021-12-07 01:38:27,327 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 17 treesize of output 13 [2021-12-07 01:38:27,382 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 20 treesize of output 22 [2021-12-07 01:38:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:28,975 INFO L354 Elim1Store]: treesize reduction 51, result has 59.8 percent of original size [2021-12-07 01:38:28,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 110 [2021-12-07 01:38:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 01:38:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:30,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| Int) (v_ArrVal_1415 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1415) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 6)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265|) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 4)) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 1)) 0) (<= (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 10) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select .cse0 (+ 7 |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265|)) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 3)) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 2)) 0) (< |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 0) (= (select .cse0 |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265|) 0) (= 0 (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_265| 5)))))) is different from false [2021-12-07 01:38:30,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:30,657 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 207 treesize of output 109 [2021-12-07 01:38:30,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:30,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 211 treesize of output 281 [2021-12-07 01:38:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:30,714 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 87 treesize of output 57 [2021-12-07 01:38:40,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:40,231 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 [2021-12-07 01:38:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 01:38:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620048490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:40,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:40,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-12-07 01:38:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268645188] [2021-12-07 01:38:40,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:40,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-07 01:38:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-07 01:38:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4221, Unknown=1, NotChecked=134, Total=4830 [2021-12-07 01:38:40,358 INFO L87 Difference]: Start difference. First operand 625 states and 696 transitions. Second operand has 70 states, 69 states have (on average 1.826086956521739) internal successors, (126), 70 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:44,584 INFO L93 Difference]: Finished difference Result 938 states and 1042 transitions. [2021-12-07 01:38:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-07 01:38:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.826086956521739) internal successors, (126), 70 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2021-12-07 01:38:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:44,587 INFO L225 Difference]: With dead ends: 938 [2021-12-07 01:38:44,587 INFO L226 Difference]: Without dead ends: 888 [2021-12-07 01:38:44,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1379, Invalid=12430, Unknown=1, NotChecked=232, Total=14042 [2021-12-07 01:38:44,588 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1079 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1530 Invalid, 0 Unknown, 337 Unchecked, 0.7s Time] [2021-12-07 01:38:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-12-07 01:38:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 689. [2021-12-07 01:38:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.1328467153284671) internal successors, (776), 688 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 776 transitions. [2021-12-07 01:38:44,595 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 776 transitions. Word has length 63 [2021-12-07 01:38:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 776 transitions. [2021-12-07 01:38:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.826086956521739) internal successors, (126), 70 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 776 transitions. [2021-12-07 01:38:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 01:38:44,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:44,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2021-12-07 01:38:44,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 01:38:44,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-07 01:38:44,797 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2021-12-07 01:38:44,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:44,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026155759] [2021-12-07 01:38:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:44,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:44,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026155759] [2021-12-07 01:38:44,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026155759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329266904] [2021-12-07 01:38:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:44,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:44,990 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 01:38:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 01:38:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:45,090 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 [2021-12-07 01:38:45,093 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 [2021-12-07 01:38:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:45,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:46,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329266904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:46,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:46,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 47 [2021-12-07 01:38:46,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849719838] [2021-12-07 01:38:46,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:46,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-07 01:38:46,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-07 01:38:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2021-12-07 01:38:46,471 INFO L87 Difference]: Start difference. First operand 689 states and 776 transitions. Second operand has 48 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:48,433 INFO L93 Difference]: Finished difference Result 1048 states and 1144 transitions. [2021-12-07 01:38:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 01:38:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 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 64 [2021-12-07 01:38:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:48,437 INFO L225 Difference]: With dead ends: 1048 [2021-12-07 01:38:48,437 INFO L226 Difference]: Without dead ends: 1048 [2021-12-07 01:38:48,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1796, Invalid=6214, Unknown=0, NotChecked=0, Total=8010 [2021-12-07 01:38:48,438 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 726 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:48,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 346 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:38:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-12-07 01:38:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 701. [2021-12-07 01:38:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 697 states have (on average 1.1362984218077474) internal successors, (792), 700 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 792 transitions. [2021-12-07 01:38:48,445 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 792 transitions. Word has length 64 [2021-12-07 01:38:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:48,445 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 792 transitions. [2021-12-07 01:38:48,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 792 transitions. [2021-12-07 01:38:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:38:48,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:48,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:48,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 01:38:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:48,646 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2021-12-07 01:38:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149226254] [2021-12-07 01:38:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:48,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:38:49,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:49,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149226254] [2021-12-07 01:38:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149226254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:49,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981924312] [2021-12-07 01:38:49,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:38:49,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:49,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:49,224 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:49,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 01:38:49,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 01:38:49,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 01:38:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:49,591 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 [2021-12-07 01:38:49,861 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-07 01:38:49,861 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 33 treesize of output 43 [2021-12-07 01:38:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:49,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:49,884 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 50 treesize of output 39 [2021-12-07 01:38:50,150 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 27 treesize of output 27 [2021-12-07 01:38:50,263 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 27 treesize of output 27 [2021-12-07 01:38:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:38:50,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:50,395 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 14 [2021-12-07 01:38:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:38:50,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:50,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1536 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1536) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-12-07 01:38:50,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1536 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1536) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-12-07 01:38:50,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1536 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1536) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) is different from false [2021-12-07 01:38:50,468 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1536 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1536) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem5#1| 0)) is different from false [2021-12-07 01:38:50,709 INFO L354 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2021-12-07 01:38:50,709 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2021-12-07 01:38:50,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:50,715 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 49 treesize of output 51 [2021-12-07 01:38:50,719 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 [2021-12-07 01:38:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:38:50,738 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 [2021-12-07 01:38:50,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:50,760 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 66 treesize of output 70 [2021-12-07 01:38:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 29 not checked. [2021-12-07 01:38:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981924312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:51,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 23] total 62 [2021-12-07 01:38:51,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53950619] [2021-12-07 01:38:51,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-07 01:38:51,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-07 01:38:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3069, Unknown=10, NotChecked=460, Total=3782 [2021-12-07 01:38:51,272 INFO L87 Difference]: Start difference. First operand 701 states and 792 transitions. Second operand has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:53,041 INFO L93 Difference]: Finished difference Result 891 states and 988 transitions. [2021-12-07 01:38:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:38:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-07 01:38:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:53,044 INFO L225 Difference]: With dead ends: 891 [2021-12-07 01:38:53,044 INFO L226 Difference]: Without dead ends: 771 [2021-12-07 01:38:53,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=612, Invalid=6876, Unknown=10, NotChecked=692, Total=8190 [2021-12-07 01:38:53,045 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 211 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 961 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:53,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 638 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 954 Invalid, 0 Unknown, 961 Unchecked, 0.4s Time] [2021-12-07 01:38:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-07 01:38:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 746. [2021-12-07 01:38:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 742 states have (on average 1.133423180592992) internal successors, (841), 745 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 841 transitions. [2021-12-07 01:38:53,051 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 841 transitions. Word has length 65 [2021-12-07 01:38:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:53,051 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 841 transitions. [2021-12-07 01:38:53,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 841 transitions. [2021-12-07 01:38:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 01:38:53,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:53,052 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:53,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-07 01:38:53,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-07 01:38:53,253 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -85875271, now seen corresponding path program 5 times [2021-12-07 01:38:53,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:53,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758759268] [2021-12-07 01:38:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:53,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:38:53,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:53,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758759268] [2021-12-07 01:38:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758759268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:53,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113279098] [2021-12-07 01:38:53,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:38:53,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:53,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:53,757 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:53,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 01:38:53,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 01:38:53,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 01:38:53,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:53,893 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 [2021-12-07 01:38:54,045 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 14 treesize of output 10 [2021-12-07 01:38:54,158 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 16 treesize of output 18 [2021-12-07 01:38:54,175 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 16 treesize of output 18 [2021-12-07 01:38:54,190 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 14 treesize of output 16 [2021-12-07 01:38:54,197 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 [2021-12-07 01:38:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 01:38:54,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:54,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1601) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-12-07 01:38:54,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1601) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-12-07 01:38:54,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1601) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) is different from false [2021-12-07 01:38:54,244 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1601 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1601) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)))) is different from false [2021-12-07 01:38:54,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1601) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) 0)) is different from false [2021-12-07 01:38:54,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:54,262 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:38:54,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:54,266 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 [2021-12-07 01:38:54,268 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 [2021-12-07 01:38:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 34 not checked. [2021-12-07 01:38:54,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113279098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:54,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:54,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 41 [2021-12-07 01:38:54,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142704247] [2021-12-07 01:38:54,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:54,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 01:38:54,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 01:38:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1146, Unknown=5, NotChecked=360, Total=1640 [2021-12-07 01:38:54,420 INFO L87 Difference]: Start difference. First operand 746 states and 841 transitions. Second operand has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:38:55,531 INFO L93 Difference]: Finished difference Result 1103 states and 1219 transitions. [2021-12-07 01:38:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 01:38:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-12-07 01:38:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:38:55,534 INFO L225 Difference]: With dead ends: 1103 [2021-12-07 01:38:55,534 INFO L226 Difference]: Without dead ends: 878 [2021-12-07 01:38:55,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=3312, Unknown=6, NotChecked=610, Total=4290 [2021-12-07 01:38:55,534 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 232 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:38:55,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1172 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1512 Invalid, 0 Unknown, 942 Unchecked, 0.5s Time] [2021-12-07 01:38:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-07 01:38:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 793. [2021-12-07 01:38:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 789 states have (on average 1.138149556400507) internal successors, (898), 792 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 898 transitions. [2021-12-07 01:38:55,542 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 898 transitions. Word has length 67 [2021-12-07 01:38:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:38:55,542 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 898 transitions. [2021-12-07 01:38:55,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:38:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 898 transitions. [2021-12-07 01:38:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 01:38:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:38:55,543 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:38:55,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 01:38:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:55,744 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:38:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:38:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2021-12-07 01:38:55,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:38:55,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198331571] [2021-12-07 01:38:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:38:55,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:38:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:38:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:38:55,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:38:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198331571] [2021-12-07 01:38:55,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198331571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:38:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088696885] [2021-12-07 01:38:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:38:55,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:38:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:38:55,908 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:38:55,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 01:38:56,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:38:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:38:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 01:38:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:38:56,014 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 [2021-12-07 01:38:56,017 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 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:38:56,125 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 18 treesize of output 14 [2021-12-07 01:38:56,141 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 21 treesize of output 23 [2021-12-07 01:38:56,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:56,264 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 22 treesize of output 22 [2021-12-07 01:38:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:38:56,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:38:57,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:57,103 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 21 treesize of output 22 [2021-12-07 01:38:57,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:38:57,108 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 33 treesize of output 33 [2021-12-07 01:38:57,111 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 9 treesize of output 7 [2021-12-07 01:38:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:38:57,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088696885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:38:57,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:38:57,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2021-12-07 01:38:57,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248081116] [2021-12-07 01:38:57,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:38:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:38:57,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:38:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:38:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:38:57,471 INFO L87 Difference]: Start difference. First operand 793 states and 898 transitions. Second operand has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:03,148 INFO L93 Difference]: Finished difference Result 1248 states and 1361 transitions. [2021-12-07 01:39:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-07 01:39:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-07 01:39:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:03,153 INFO L225 Difference]: With dead ends: 1248 [2021-12-07 01:39:03,153 INFO L226 Difference]: Without dead ends: 1246 [2021-12-07 01:39:03,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7377 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5125, Invalid=23267, Unknown=0, NotChecked=0, Total=28392 [2021-12-07 01:39:03,154 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 511 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:03,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1115 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2821 Invalid, 0 Unknown, 981 Unchecked, 1.0s Time] [2021-12-07 01:39:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-12-07 01:39:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 758. [2021-12-07 01:39:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 755 states have (on average 1.1298013245033112) internal successors, (853), 757 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 853 transitions. [2021-12-07 01:39:03,162 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 853 transitions. Word has length 68 [2021-12-07 01:39:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:03,163 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 853 transitions. [2021-12-07 01:39:03,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 853 transitions. [2021-12-07 01:39:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 01:39:03,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,163 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 01:39:03,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:03,365 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1839867893, now seen corresponding path program 2 times [2021-12-07 01:39:03,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426156895] [2021-12-07 01:39:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:03,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426156895] [2021-12-07 01:39:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426156895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388116588] [2021-12-07 01:39:03,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:03,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:03,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:03,597 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:03,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 01:39:03,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 01:39:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:03,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:03,705 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 [2021-12-07 01:39:03,708 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 [2021-12-07 01:39:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:04,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:04,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:39:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:04,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388116588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:04,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:04,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 56 [2021-12-07 01:39:04,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710116925] [2021-12-07 01:39:04,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:04,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 01:39:04,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 01:39:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2773, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 01:39:04,972 INFO L87 Difference]: Start difference. First operand 758 states and 853 transitions. Second operand has 57 states, 56 states have (on average 3.25) internal successors, (182), 57 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) [2021-12-07 01:39:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:07,132 INFO L93 Difference]: Finished difference Result 1195 states and 1294 transitions. [2021-12-07 01:39:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-07 01:39:07,132 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.25) internal successors, (182), 57 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 68 [2021-12-07 01:39:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:07,135 INFO L225 Difference]: With dead ends: 1195 [2021-12-07 01:39:07,135 INFO L226 Difference]: Without dead ends: 1078 [2021-12-07 01:39:07,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2189, Invalid=8317, Unknown=0, NotChecked=0, Total=10506 [2021-12-07 01:39:07,136 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1369 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:07,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 635 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:39:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-12-07 01:39:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 763. [2021-12-07 01:39:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 760 states have (on average 1.1289473684210527) internal successors, (858), 762 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 858 transitions. [2021-12-07 01:39:07,144 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 858 transitions. Word has length 68 [2021-12-07 01:39:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:07,144 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 858 transitions. [2021-12-07 01:39:07,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.25) internal successors, (182), 57 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) [2021-12-07 01:39:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 858 transitions. [2021-12-07 01:39:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:39:07,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:07,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:07,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 01:39:07,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-07 01:39:07,345 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1504753370, now seen corresponding path program 7 times [2021-12-07 01:39:07,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:07,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804155015] [2021-12-07 01:39:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:07,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:07,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804155015] [2021-12-07 01:39:07,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804155015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188903304] [2021-12-07 01:39:07,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:07,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:07,475 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:07,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 01:39:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:39:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:07,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:07,887 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 [2021-12-07 01:39:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188903304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:07,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-07 01:39:07,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91902770] [2021-12-07 01:39:07,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 01:39:07,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 01:39:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:39:07,922 INFO L87 Difference]: Start difference. First operand 763 states and 858 transitions. Second operand has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:08,494 INFO L93 Difference]: Finished difference Result 863 states and 949 transitions. [2021-12-07 01:39:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:39:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-07 01:39:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:08,497 INFO L225 Difference]: With dead ends: 863 [2021-12-07 01:39:08,497 INFO L226 Difference]: Without dead ends: 863 [2021-12-07 01:39:08,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:39:08,497 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 465 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:08,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 447 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:39:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-12-07 01:39:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 800. [2021-12-07 01:39:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 797 states have (on average 1.122961104140527) internal successors, (895), 799 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 895 transitions. [2021-12-07 01:39:08,506 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 895 transitions. Word has length 73 [2021-12-07 01:39:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 895 transitions. [2021-12-07 01:39:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 895 transitions. [2021-12-07 01:39:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 01:39:08,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:08,507 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:08,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 01:39:08,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-07 01:39:08,708 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1276815283, now seen corresponding path program 5 times [2021-12-07 01:39:08,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:08,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043205523] [2021-12-07 01:39:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:08,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 153 proven. 192 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:39:09,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043205523] [2021-12-07 01:39:09,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043205523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158755610] [2021-12-07 01:39:09,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:09,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:09,002 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:09,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 01:39:09,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-07 01:39:09,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:09,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 01:39:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:09,150 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 [2021-12-07 01:39:09,388 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 17 treesize of output 13 [2021-12-07 01:39:09,435 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 20 treesize of output 22 [2021-12-07 01:39:09,558 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 [2021-12-07 01:39:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 153 proven. 192 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:39:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:09,639 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1840 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1840) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-07 01:39:09,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:09,643 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 26 treesize of output 27 [2021-12-07 01:39:09,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:09,646 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 40 treesize of output 40 [2021-12-07 01:39:09,648 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 [2021-12-07 01:39:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 153 proven. 192 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:39:09,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158755610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:09,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:09,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 43 [2021-12-07 01:39:09,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479392353] [2021-12-07 01:39:09,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:09,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 01:39:09,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 01:39:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1606, Unknown=1, NotChecked=80, Total=1806 [2021-12-07 01:39:09,825 INFO L87 Difference]: Start difference. First operand 800 states and 895 transitions. Second operand has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:10,706 INFO L93 Difference]: Finished difference Result 1854 states and 1985 transitions. [2021-12-07 01:39:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 01:39:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2021-12-07 01:39:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:10,712 INFO L225 Difference]: With dead ends: 1854 [2021-12-07 01:39:10,712 INFO L226 Difference]: Without dead ends: 1810 [2021-12-07 01:39:10,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=2667, Unknown=1, NotChecked=104, Total=2970 [2021-12-07 01:39:10,712 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 245 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:10,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2719 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2293 Invalid, 0 Unknown, 323 Unchecked, 0.6s Time] [2021-12-07 01:39:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-12-07 01:39:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 883. [2021-12-07 01:39:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 880 states have (on average 1.128409090909091) internal successors, (993), 882 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 993 transitions. [2021-12-07 01:39:10,728 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 993 transitions. Word has length 79 [2021-12-07 01:39:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 993 transitions. [2021-12-07 01:39:10,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 993 transitions. [2021-12-07 01:39:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 01:39:10,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:10,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:10,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-07 01:39:10,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-07 01:39:10,930 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1245596556, now seen corresponding path program 8 times [2021-12-07 01:39:10,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513644841] [2021-12-07 01:39:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:10,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 34 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:11,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513644841] [2021-12-07 01:39:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513644841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932056550] [2021-12-07 01:39:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:11,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:11,672 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:11,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 01:39:11,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:11,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 01:39:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:11,780 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 [2021-12-07 01:39:11,928 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 14 treesize of output 10 [2021-12-07 01:39:12,185 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 17 treesize of output 19 [2021-12-07 01:39:12,312 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 17 treesize of output 19 [2021-12-07 01:39:12,456 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 17 treesize of output 19 [2021-12-07 01:39:12,595 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 17 treesize of output 19 [2021-12-07 01:39:12,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:12,767 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 20 treesize of output 20 [2021-12-07 01:39:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:13,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1918 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| Int)) (or (< |c_ULTIMATE.start_cstrncat_~s2#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|) (< |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| 0) (<= (+ 6 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1918) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| 4)) 0))) is different from false [2021-12-07 01:39:13,596 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1918 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| Int)) (or (<= (+ 6 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (< |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1918) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166| 4)) 0) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_166|))) is different from false [2021-12-07 01:39:13,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:13,606 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 [2021-12-07 01:39:13,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:13,612 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 [2021-12-07 01:39:13,616 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 [2021-12-07 01:39:13,618 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 15 treesize of output 11 [2021-12-07 01:39:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 10 not checked. [2021-12-07 01:39:13,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932056550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:13,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:13,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 20] total 66 [2021-12-07 01:39:13,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785881552] [2021-12-07 01:39:13,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-07 01:39:13,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-07 01:39:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3775, Unknown=2, NotChecked=250, Total=4290 [2021-12-07 01:39:13,921 INFO L87 Difference]: Start difference. First operand 883 states and 993 transitions. Second operand has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 66 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:15,787 INFO L93 Difference]: Finished difference Result 979 states and 1087 transitions. [2021-12-07 01:39:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-07 01:39:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 66 states have internal predecessors, (197), 0 states have call successors, (0), 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 [2021-12-07 01:39:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:15,790 INFO L225 Difference]: With dead ends: 979 [2021-12-07 01:39:15,791 INFO L226 Difference]: Without dead ends: 949 [2021-12-07 01:39:15,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=644, Invalid=8292, Unknown=2, NotChecked=374, Total=9312 [2021-12-07 01:39:15,791 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:15,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1016 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1022 Invalid, 0 Unknown, 618 Unchecked, 0.4s Time] [2021-12-07 01:39:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-12-07 01:39:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 868. [2021-12-07 01:39:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 865 states have (on average 1.1283236994219654) internal successors, (976), 867 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) [2021-12-07 01:39:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 976 transitions. [2021-12-07 01:39:15,799 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 976 transitions. Word has length 79 [2021-12-07 01:39:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 976 transitions. [2021-12-07 01:39:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 66 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 976 transitions. [2021-12-07 01:39:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:39:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:15,800 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:15,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-07 01:39:16,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-07 01:39:16,001 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1070218529, now seen corresponding path program 3 times [2021-12-07 01:39:16,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544527521] [2021-12-07 01:39:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:16,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 49 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:16,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544527521] [2021-12-07 01:39:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544527521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481717580] [2021-12-07 01:39:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:16,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:16,304 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:16,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:39:16,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-07 01:39:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 01:39:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:16,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:16,613 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 [2021-12-07 01:39:16,615 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 [2021-12-07 01:39:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:17,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:39:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:39:18,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481717580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:18,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:18,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 69 [2021-12-07 01:39:18,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486679613] [2021-12-07 01:39:18,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:18,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-07 01:39:18,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:18,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-07 01:39:18,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=4196, Unknown=0, NotChecked=0, Total=4830 [2021-12-07 01:39:18,419 INFO L87 Difference]: Start difference. First operand 868 states and 976 transitions. Second operand has 70 states, 69 states have (on average 3.1594202898550723) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:23,079 INFO L93 Difference]: Finished difference Result 1410 states and 1522 transitions. [2021-12-07 01:39:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-07 01:39:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.1594202898550723) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 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 80 [2021-12-07 01:39:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:23,083 INFO L225 Difference]: With dead ends: 1410 [2021-12-07 01:39:23,083 INFO L226 Difference]: Without dead ends: 1277 [2021-12-07 01:39:23,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4944, Invalid=17108, Unknown=0, NotChecked=0, Total=22052 [2021-12-07 01:39:23,084 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 878 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:23,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1388 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:39:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-12-07 01:39:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 791. [2021-12-07 01:39:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 788 states have (on average 1.1230964467005076) internal successors, (885), 790 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 885 transitions. [2021-12-07 01:39:23,093 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 885 transitions. Word has length 80 [2021-12-07 01:39:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:23,094 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 885 transitions. [2021-12-07 01:39:23,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.1594202898550723) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 885 transitions. [2021-12-07 01:39:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:39:23,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:23,095 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:23,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 01:39:23,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:23,295 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1700131356, now seen corresponding path program 4 times [2021-12-07 01:39:23,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:23,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573877983] [2021-12-07 01:39:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:23,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:23,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573877983] [2021-12-07 01:39:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573877983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779519734] [2021-12-07 01:39:23,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:23,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:23,579 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 01:39:23,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-07 01:39:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:23,701 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 [2021-12-07 01:39:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:23,704 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 [2021-12-07 01:39:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:39:24,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:26,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:39:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:39:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779519734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:26,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 62 [2021-12-07 01:39:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603468266] [2021-12-07 01:39:26,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:26,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-07 01:39:26,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-07 01:39:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3584, Unknown=0, NotChecked=0, Total=3906 [2021-12-07 01:39:26,174 INFO L87 Difference]: Start difference. First operand 791 states and 885 transitions. Second operand has 63 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 63 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:37,672 INFO L93 Difference]: Finished difference Result 1214 states and 1312 transitions. [2021-12-07 01:39:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-12-07 01:39:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 63 states have internal predecessors, (171), 0 states have call successors, (0), 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 80 [2021-12-07 01:39:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:37,676 INFO L225 Difference]: With dead ends: 1214 [2021-12-07 01:39:37,676 INFO L226 Difference]: Without dead ends: 1214 [2021-12-07 01:39:37,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13878 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=6009, Invalid=38301, Unknown=0, NotChecked=0, Total=44310 [2021-12-07 01:39:37,678 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1296 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 3476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:37,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 940 Invalid, 3476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2861 Invalid, 0 Unknown, 97 Unchecked, 1.3s Time] [2021-12-07 01:39:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-12-07 01:39:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 828. [2021-12-07 01:39:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 825 states have (on average 1.121212121212121) internal successors, (925), 827 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 925 transitions. [2021-12-07 01:39:37,687 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 925 transitions. Word has length 80 [2021-12-07 01:39:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:37,687 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 925 transitions. [2021-12-07 01:39:37,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.7580645161290325) internal successors, (171), 63 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 925 transitions. [2021-12-07 01:39:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 01:39:37,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:37,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:37,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-07 01:39:37,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:37,889 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2025764261, now seen corresponding path program 6 times [2021-12-07 01:39:37,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:37,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123014516] [2021-12-07 01:39:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:37,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 34 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:39:38,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123014516] [2021-12-07 01:39:38,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123014516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871487693] [2021-12-07 01:39:38,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:38,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:38,495 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:38,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 01:39:38,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-07 01:39:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:39:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:38,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:39:38,756 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 [2021-12-07 01:39:38,759 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 [2021-12-07 01:39:38,905 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 [2021-12-07 01:39:38,963 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 [2021-12-07 01:39:38,979 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 [2021-12-07 01:39:38,995 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 [2021-12-07 01:39:39,011 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 [2021-12-07 01:39:39,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:39,070 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 [2021-12-07 01:39:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-07 01:39:39,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:39,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:39,766 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 [2021-12-07 01:39:39,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:39,770 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 [2021-12-07 01:39:39,773 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 [2021-12-07 01:39:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 01:39:40,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871487693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:40,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:40,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10, 10] total 47 [2021-12-07 01:39:40,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521267581] [2021-12-07 01:39:40,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:40,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-07 01:39:40,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-07 01:39:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2010, Unknown=16, NotChecked=0, Total=2162 [2021-12-07 01:39:40,166 INFO L87 Difference]: Start difference. First operand 828 states and 925 transitions. Second operand has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 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) [2021-12-07 01:39:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:42,986 INFO L93 Difference]: Finished difference Result 925 states and 1015 transitions. [2021-12-07 01:39:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 01:39:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 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 81 [2021-12-07 01:39:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:42,989 INFO L225 Difference]: With dead ends: 925 [2021-12-07 01:39:42,990 INFO L226 Difference]: Without dead ends: 799 [2021-12-07 01:39:42,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1162, Invalid=7012, Unknown=16, NotChecked=0, Total=8190 [2021-12-07 01:39:42,990 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 217 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:42,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 578 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1481 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2021-12-07 01:39:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-07 01:39:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 560. [2021-12-07 01:39:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 558 states have (on average 1.1326164874551972) internal successors, (632), 559 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 632 transitions. [2021-12-07 01:39:42,995 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 632 transitions. Word has length 81 [2021-12-07 01:39:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:42,996 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 632 transitions. [2021-12-07 01:39:42,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 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) [2021-12-07 01:39:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 632 transitions. [2021-12-07 01:39:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:39:42,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:42,996 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:43,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-07 01:39:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:43,198 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1594761968, now seen corresponding path program 6 times [2021-12-07 01:39:43,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:43,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995937852] [2021-12-07 01:39:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:43,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 150 proven. 243 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:39:43,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:43,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995937852] [2021-12-07 01:39:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995937852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:43,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003595290] [2021-12-07 01:39:43,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:43,529 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 01:39:43,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-07 01:39:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 01:39:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:43,759 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 [2021-12-07 01:39:44,055 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 17 treesize of output 13 [2021-12-07 01:39:44,099 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 20 treesize of output 22 [2021-12-07 01:39:44,224 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 [2021-12-07 01:39:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 150 proven. 243 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:39:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:44,307 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2193 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2193) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-07 01:39:44,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:44,310 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 26 treesize of output 27 [2021-12-07 01:39:44,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:44,314 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 40 treesize of output 40 [2021-12-07 01:39:44,316 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 [2021-12-07 01:39:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 150 proven. 243 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:39:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003595290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:44,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:44,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 46 [2021-12-07 01:39:44,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127736850] [2021-12-07 01:39:44,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:44,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:39:44,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:39:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1857, Unknown=1, NotChecked=86, Total=2070 [2021-12-07 01:39:44,519 INFO L87 Difference]: Start difference. First operand 560 states and 632 transitions. Second operand has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:45,881 INFO L93 Difference]: Finished difference Result 1195 states and 1280 transitions. [2021-12-07 01:39:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:39:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2021-12-07 01:39:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:45,885 INFO L225 Difference]: With dead ends: 1195 [2021-12-07 01:39:45,885 INFO L226 Difference]: Without dead ends: 1147 [2021-12-07 01:39:45,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=4230, Unknown=1, NotChecked=132, Total=4692 [2021-12-07 01:39:45,885 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 409 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 3057 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:45,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 3082 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3057 Invalid, 0 Unknown, 326 Unchecked, 0.8s Time] [2021-12-07 01:39:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-12-07 01:39:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 655. [2021-12-07 01:39:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 653 states have (on average 1.1301684532924963) internal successors, (738), 654 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 738 transitions. [2021-12-07 01:39:45,892 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 738 transitions. Word has length 83 [2021-12-07 01:39:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 738 transitions. [2021-12-07 01:39:45,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 738 transitions. [2021-12-07 01:39:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:39:45,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:45,893 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:45,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:46,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-07 01:39:46,094 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -149905050, now seen corresponding path program 5 times [2021-12-07 01:39:46,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210348133] [2021-12-07 01:39:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:46,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:39:46,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210348133] [2021-12-07 01:39:46,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210348133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469877340] [2021-12-07 01:39:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:46,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:46,495 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:46,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 01:39:46,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-07 01:39:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-07 01:39:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:46,771 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:39:46,771 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 [2021-12-07 01:39:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469877340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:50,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:50,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 31] total 82 [2021-12-07 01:39:50,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574019996] [2021-12-07 01:39:50,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:50,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-07 01:39:50,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-07 01:39:50,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=6259, Unknown=0, NotChecked=0, Total=6806 [2021-12-07 01:39:50,724 INFO L87 Difference]: Start difference. First operand 655 states and 738 transitions. Second operand has 83 states, 82 states have (on average 2.8658536585365852) internal successors, (235), 83 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:58,471 INFO L93 Difference]: Finished difference Result 1155 states and 1267 transitions. [2021-12-07 01:39:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-07 01:39:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.8658536585365852) internal successors, (235), 83 states have internal predecessors, (235), 0 states have call successors, (0), 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 84 [2021-12-07 01:39:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:58,473 INFO L225 Difference]: With dead ends: 1155 [2021-12-07 01:39:58,473 INFO L226 Difference]: Without dead ends: 1070 [2021-12-07 01:39:58,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 138 SyntacticMatches, 51 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14005 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3259, Invalid=32651, Unknown=0, NotChecked=0, Total=35910 [2021-12-07 01:39:58,474 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 447 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1375 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:58,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1600 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1870 Invalid, 0 Unknown, 1375 Unchecked, 0.7s Time] [2021-12-07 01:39:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-12-07 01:39:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 646. [2021-12-07 01:39:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 644 states have (on average 1.1273291925465838) internal successors, (726), 645 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 726 transitions. [2021-12-07 01:39:58,481 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 726 transitions. Word has length 84 [2021-12-07 01:39:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:58,481 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 726 transitions. [2021-12-07 01:39:58,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.8658536585365852) internal successors, (235), 83 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 726 transitions. [2021-12-07 01:39:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:39:58,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:58,482 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:58,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:58,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:58,682 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:39:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1572529171, now seen corresponding path program 7 times [2021-12-07 01:39:58,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336426565] [2021-12-07 01:39:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:58,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 143 proven. 300 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:39:59,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336426565] [2021-12-07 01:39:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336426565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:59,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773726806] [2021-12-07 01:39:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:59,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:59,042 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:59,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 01:39:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-07 01:39:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:59,188 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 [2021-12-07 01:39:59,491 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 17 treesize of output 13 [2021-12-07 01:39:59,540 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 20 treesize of output 22 [2021-12-07 01:39:59,686 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 [2021-12-07 01:39:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 143 proven. 300 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:39:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:59,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2324 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2324) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-07 01:39:59,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:59,778 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 26 treesize of output 27 [2021-12-07 01:39:59,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:59,782 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 40 treesize of output 40 [2021-12-07 01:39:59,784 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 [2021-12-07 01:40:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 143 proven. 300 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:40:00,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773726806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:00,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:00,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 49 [2021-12-07 01:40:00,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183281240] [2021-12-07 01:40:00,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:00,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:40:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:40:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2126, Unknown=1, NotChecked=92, Total=2352 [2021-12-07 01:40:00,007 INFO L87 Difference]: Start difference. First operand 646 states and 726 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:01,711 INFO L93 Difference]: Finished difference Result 1366 states and 1463 transitions. [2021-12-07 01:40:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 01:40:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 [2021-12-07 01:40:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:01,713 INFO L225 Difference]: With dead ends: 1366 [2021-12-07 01:40:01,713 INFO L226 Difference]: Without dead ends: 1314 [2021-12-07 01:40:01,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=4818, Unknown=1, NotChecked=140, Total=5256 [2021-12-07 01:40:01,714 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 303 mSDsluCounter, 4224 mSDsCounter, 0 mSdLazyCounter, 4390 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 4361 SdHoareTripleChecker+Invalid, 4854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:01,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 4361 Invalid, 4854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 4390 Invalid, 0 Unknown, 412 Unchecked, 1.1s Time] [2021-12-07 01:40:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-12-07 01:40:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 741. [2021-12-07 01:40:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 739 states have (on average 1.1299052774018945) internal successors, (835), 740 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 835 transitions. [2021-12-07 01:40:01,721 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 835 transitions. Word has length 87 [2021-12-07 01:40:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:01,721 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 835 transitions. [2021-12-07 01:40:01,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 835 transitions. [2021-12-07 01:40:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:40:01,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:01,722 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:01,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-07 01:40:01,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-07 01:40:01,923 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash 938714186, now seen corresponding path program 8 times [2021-12-07 01:40:01,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:01,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029711040] [2021-12-07 01:40:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:01,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 132 proven. 363 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:40:02,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:02,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029711040] [2021-12-07 01:40:02,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029711040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:02,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368347126] [2021-12-07 01:40:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:40:02,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:02,326 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:02,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 01:40:02,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:40:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 01:40:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:02,457 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 [2021-12-07 01:40:02,812 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 17 treesize of output 13 [2021-12-07 01:40:02,866 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 20 treesize of output 22 [2021-12-07 01:40:03,040 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 [2021-12-07 01:40:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 132 proven. 363 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:40:03,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:03,132 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2390 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2390) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0)) is different from false [2021-12-07 01:40:03,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:03,137 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 26 treesize of output 27 [2021-12-07 01:40:03,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:03,140 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 40 treesize of output 40 [2021-12-07 01:40:03,143 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 [2021-12-07 01:40:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 132 proven. 363 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:40:03,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368347126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:03,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:03,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 52 [2021-12-07 01:40:03,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43643178] [2021-12-07 01:40:03,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 01:40:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 01:40:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2413, Unknown=1, NotChecked=98, Total=2652 [2021-12-07 01:40:03,377 INFO L87 Difference]: Start difference. First operand 741 states and 835 transitions. Second operand has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 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) [2021-12-07 01:40:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:05,319 INFO L93 Difference]: Finished difference Result 1623 states and 1739 transitions. [2021-12-07 01:40:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-07 01:40:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 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) Word has length 91 [2021-12-07 01:40:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:05,321 INFO L225 Difference]: With dead ends: 1623 [2021-12-07 01:40:05,321 INFO L226 Difference]: Without dead ends: 1567 [2021-12-07 01:40:05,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=316, Invalid=5539, Unknown=1, NotChecked=150, Total=6006 [2021-12-07 01:40:05,321 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 428 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 5028 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 4905 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:05,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 4905 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5028 Invalid, 0 Unknown, 259 Unchecked, 1.3s Time] [2021-12-07 01:40:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-12-07 01:40:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 836. [2021-12-07 01:40:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 834 states have (on average 1.13189448441247) internal successors, (944), 835 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 944 transitions. [2021-12-07 01:40:05,330 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 944 transitions. Word has length 91 [2021-12-07 01:40:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:05,330 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 944 transitions. [2021-12-07 01:40:05,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 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) [2021-12-07 01:40:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 944 transitions. [2021-12-07 01:40:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-07 01:40:05,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:05,331 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:05,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-07 01:40:05,532 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1073990323, now seen corresponding path program 6 times [2021-12-07 01:40:05,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:05,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403313933] [2021-12-07 01:40:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:05,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 95 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:40:05,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403313933] [2021-12-07 01:40:05,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403313933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654697117] [2021-12-07 01:40:05,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:40:05,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:05,887 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:05,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-07 01:40:06,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-07 01:40:06,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:06,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-07 01:40:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:40:06,320 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 [2021-12-07 01:40:06,322 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 [2021-12-07 01:40:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 120 proven. 137 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:40:07,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:08,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:40:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 153 proven. 104 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:40:08,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654697117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:08,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:08,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 81 [2021-12-07 01:40:08,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557061386] [2021-12-07 01:40:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:08,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-07 01:40:08,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-07 01:40:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=5776, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 01:40:08,479 INFO L87 Difference]: Start difference. First operand 836 states and 944 transitions. Second operand has 82 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 82 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:13,346 INFO L93 Difference]: Finished difference Result 1454 states and 1563 transitions. [2021-12-07 01:40:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-07 01:40:13,347 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 82 states have internal predecessors, (254), 0 states have call successors, (0), 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 92 [2021-12-07 01:40:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:13,349 INFO L225 Difference]: With dead ends: 1454 [2021-12-07 01:40:13,349 INFO L226 Difference]: Without dead ends: 1283 [2021-12-07 01:40:13,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6495 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6189, Invalid=21533, Unknown=0, NotChecked=0, Total=27722 [2021-12-07 01:40:13,351 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1238 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:13,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 973 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:40:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-12-07 01:40:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 751. [2021-12-07 01:40:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.124165554072096) internal successors, (842), 750 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 842 transitions. [2021-12-07 01:40:13,361 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 842 transitions. Word has length 92 [2021-12-07 01:40:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:13,361 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 842 transitions. [2021-12-07 01:40:13,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 82 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 842 transitions. [2021-12-07 01:40:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-07 01:40:13,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:13,363 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:13,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:13,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-07 01:40:13,564 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1840566483, now seen corresponding path program 7 times [2021-12-07 01:40:13,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181910347] [2021-12-07 01:40:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:13,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 94 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:40:13,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181910347] [2021-12-07 01:40:13,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181910347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101712921] [2021-12-07 01:40:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:40:13,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:13,724 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-07 01:40:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 01:40:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:13,852 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:40:13,852 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 [2021-12-07 01:40:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 104 proven. 37 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:40:14,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:40:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101712921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:14,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:14,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2021-12-07 01:40:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171230655] [2021-12-07 01:40:14,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:14,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:40:14,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:40:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:40:14,366 INFO L87 Difference]: Start difference. First operand 751 states and 842 transitions. Second operand has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:15,096 INFO L93 Difference]: Finished difference Result 1256 states and 1385 transitions. [2021-12-07 01:40:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:40:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 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 92 [2021-12-07 01:40:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:15,097 INFO L225 Difference]: With dead ends: 1256 [2021-12-07 01:40:15,097 INFO L226 Difference]: Without dead ends: 1071 [2021-12-07 01:40:15,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=4484, Unknown=0, NotChecked=0, Total=5852 [2021-12-07 01:40:15,098 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 348 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:15,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 678 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:40:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-12-07 01:40:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 948. [2021-12-07 01:40:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.1226215644820297) internal successors, (1062), 947 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1062 transitions. [2021-12-07 01:40:15,105 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1062 transitions. Word has length 92 [2021-12-07 01:40:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:15,105 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1062 transitions. [2021-12-07 01:40:15,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1062 transitions. [2021-12-07 01:40:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:40:15,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:15,106 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:15,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:15,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-07 01:40:15,307 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash -935545305, now seen corresponding path program 9 times [2021-12-07 01:40:15,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:15,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284560645] [2021-12-07 01:40:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:15,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 117 proven. 432 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:40:15,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284560645] [2021-12-07 01:40:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284560645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71974607] [2021-12-07 01:40:15,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:40:15,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:15,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:15,754 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:15,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-07 01:40:16,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-07 01:40:16,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:16,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-07 01:40:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:16,162 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 [2021-12-07 01:40:16,558 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 17 treesize of output 13 [2021-12-07 01:40:16,609 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 20 treesize of output 22 [2021-12-07 01:40:16,763 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 [2021-12-07 01:40:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 117 proven. 432 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:40:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:16,854 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2614) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0)) is different from false [2021-12-07 01:40:16,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:16,857 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 26 treesize of output 27 [2021-12-07 01:40:16,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:16,860 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 40 treesize of output 40 [2021-12-07 01:40:16,863 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 [2021-12-07 01:40:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 117 proven. 432 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:40:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71974607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:17,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:17,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 55 [2021-12-07 01:40:17,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769366958] [2021-12-07 01:40:17,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:17,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-07 01:40:17,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-07 01:40:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2718, Unknown=1, NotChecked=104, Total=2970 [2021-12-07 01:40:17,097 INFO L87 Difference]: Start difference. First operand 948 states and 1062 transitions. Second operand has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 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) [2021-12-07 01:40:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:18,977 INFO L93 Difference]: Finished difference Result 2127 states and 2269 transitions. [2021-12-07 01:40:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 01:40:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 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 95 [2021-12-07 01:40:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:18,980 INFO L225 Difference]: With dead ends: 2127 [2021-12-07 01:40:18,980 INFO L226 Difference]: Without dead ends: 2067 [2021-12-07 01:40:18,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=4587, Unknown=1, NotChecked=136, Total=4970 [2021-12-07 01:40:18,980 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 372 mSDsluCounter, 5919 mSDsCounter, 0 mSdLazyCounter, 5824 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 6470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:18,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 6095 Invalid, 6470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5824 Invalid, 0 Unknown, 604 Unchecked, 1.4s Time] [2021-12-07 01:40:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-12-07 01:40:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1086. [2021-12-07 01:40:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1084 states have (on average 1.1254612546125462) internal successors, (1220), 1085 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1220 transitions. [2021-12-07 01:40:18,990 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1220 transitions. Word has length 95 [2021-12-07 01:40:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:18,990 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1220 transitions. [2021-12-07 01:40:18,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.8363636363636364) internal successors, (156), 55 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) [2021-12-07 01:40:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1220 transitions. [2021-12-07 01:40:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:40:18,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:18,991 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:19,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-07 01:40:19,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-07 01:40:19,192 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2006778054, now seen corresponding path program 8 times [2021-12-07 01:40:19,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863592019] [2021-12-07 01:40:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:19,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 6 proven. 216 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:40:19,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863592019] [2021-12-07 01:40:19,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863592019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480151262] [2021-12-07 01:40:19,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:40:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:19,704 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:19,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-07 01:40:19,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:40:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 01:40:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:40:19,847 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 [2021-12-07 01:40:19,849 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 [2021-12-07 01:40:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 152 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:40:21,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:23,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:40:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 116 proven. 102 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:40:23,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480151262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:23,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:23,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 83 [2021-12-07 01:40:23,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612037495] [2021-12-07 01:40:23,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:23,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-07 01:40:23,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-07 01:40:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6505, Unknown=0, NotChecked=0, Total=6972 [2021-12-07 01:40:23,025 INFO L87 Difference]: Start difference. First operand 1086 states and 1220 transitions. Second operand has 84 states, 83 states have (on average 3.0) internal successors, (249), 84 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:34,341 INFO L93 Difference]: Finished difference Result 1976 states and 2110 transitions. [2021-12-07 01:40:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-07 01:40:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 3.0) internal successors, (249), 84 states have internal predecessors, (249), 0 states have call successors, (0), 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 96 [2021-12-07 01:40:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:34,343 INFO L225 Difference]: With dead ends: 1976 [2021-12-07 01:40:34,343 INFO L226 Difference]: Without dead ends: 1835 [2021-12-07 01:40:34,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11082 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=6394, Invalid=40478, Unknown=0, NotChecked=0, Total=46872 [2021-12-07 01:40:34,345 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2812 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 7336 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2812 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 8074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 7336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:34,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2812 Valid, 3392 Invalid, 8074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 7336 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 01:40:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-12-07 01:40:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1057. [2021-12-07 01:40:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1055 states have (on average 1.1232227488151658) internal successors, (1185), 1056 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1185 transitions. [2021-12-07 01:40:34,354 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1185 transitions. Word has length 96 [2021-12-07 01:40:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:34,354 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1185 transitions. [2021-12-07 01:40:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 3.0) internal successors, (249), 84 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1185 transitions. [2021-12-07 01:40:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:40:34,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:34,355 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:34,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-07 01:40:34,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:34,556 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash -95601872, now seen corresponding path program 9 times [2021-12-07 01:40:34,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:34,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130951537] [2021-12-07 01:40:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:34,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 91 proven. 68 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:40:34,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:34,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130951537] [2021-12-07 01:40:34,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130951537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:34,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565740581] [2021-12-07 01:40:34,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:40:34,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:34,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:34,705 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:34,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-07 01:40:35,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-07 01:40:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:35,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:40:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:35,115 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:40:35,115 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 [2021-12-07 01:40:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:40:35,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-07 01:40:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565740581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:35,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:35,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2021-12-07 01:40:35,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451089119] [2021-12-07 01:40:35,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:35,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 01:40:35,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 01:40:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:40:35,776 INFO L87 Difference]: Start difference. First operand 1057 states and 1185 transitions. Second operand has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:37,530 INFO L93 Difference]: Finished difference Result 1993 states and 2162 transitions. [2021-12-07 01:40:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-07 01:40:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-07 01:40:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:37,532 INFO L225 Difference]: With dead ends: 1993 [2021-12-07 01:40:37,532 INFO L226 Difference]: Without dead ends: 1599 [2021-12-07 01:40:37,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3833 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2451, Invalid=11591, Unknown=0, NotChecked=0, Total=14042 [2021-12-07 01:40:37,533 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 649 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:37,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 972 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:40:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-07 01:40:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1276. [2021-12-07 01:40:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1274 states have (on average 1.1232339089481946) internal successors, (1431), 1275 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1431 transitions. [2021-12-07 01:40:37,547 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1431 transitions. Word has length 96 [2021-12-07 01:40:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:37,547 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1431 transitions. [2021-12-07 01:40:37,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.395348837209302) internal successors, (189), 43 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1431 transitions. [2021-12-07 01:40:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-07 01:40:37,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:37,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:37,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-07 01:40:37,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:37,749 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash -870668809, now seen corresponding path program 10 times [2021-12-07 01:40:37,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943833215] [2021-12-07 01:40:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:37,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:40:38,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943833215] [2021-12-07 01:40:38,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943833215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412035741] [2021-12-07 01:40:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:40:38,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:38,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:38,141 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:38,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-07 01:40:38,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:40:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:38,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-07 01:40:38,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:40:38,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:40:38,298 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 [2021-12-07 01:40:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:40:40,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:40:43,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412035741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:43,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:43,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33, 33] total 85 [2021-12-07 01:40:43,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544016985] [2021-12-07 01:40:43,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-07 01:40:43,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-07 01:40:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=6593, Unknown=0, NotChecked=0, Total=7310 [2021-12-07 01:40:43,844 INFO L87 Difference]: Start difference. First operand 1276 states and 1431 transitions. Second operand has 86 states, 85 states have (on average 2.7176470588235295) internal successors, (231), 86 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:51,777 INFO L93 Difference]: Finished difference Result 1504 states and 1657 transitions. [2021-12-07 01:40:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-07 01:40:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.7176470588235295) internal successors, (231), 86 states have internal predecessors, (231), 0 states have call successors, (0), 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 96 [2021-12-07 01:40:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:51,781 INFO L225 Difference]: With dead ends: 1504 [2021-12-07 01:40:51,782 INFO L226 Difference]: Without dead ends: 1388 [2021-12-07 01:40:51,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3392, Invalid=19560, Unknown=0, NotChecked=0, Total=22952 [2021-12-07 01:40:51,783 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 750 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:51,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 909 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3046 Invalid, 0 Unknown, 67 Unchecked, 1.4s Time] [2021-12-07 01:40:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-12-07 01:40:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1214. [2021-12-07 01:40:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1212 states have (on average 1.1212871287128714) internal successors, (1359), 1213 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1359 transitions. [2021-12-07 01:40:51,791 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1359 transitions. Word has length 96 [2021-12-07 01:40:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:51,791 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1359 transitions. [2021-12-07 01:40:51,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.7176470588235295) internal successors, (231), 86 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1359 transitions. [2021-12-07 01:40:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-07 01:40:51,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:51,792 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:51,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-07 01:40:51,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-07 01:40:51,993 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:40:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -416136070, now seen corresponding path program 11 times [2021-12-07 01:40:51,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:51,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786467662] [2021-12-07 01:40:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:51,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 6 proven. 179 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:40:52,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786467662] [2021-12-07 01:40:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786467662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126454803] [2021-12-07 01:40:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:40:52,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:52,452 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:52,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-07 01:40:52,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-07 01:40:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 01:40:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:40:52,774 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 [2021-12-07 01:40:52,776 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 [2021-12-07 01:40:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 66 proven. 119 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:40:54,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:40:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 91 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:40:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126454803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:56,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:56,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 82 [2021-12-07 01:40:56,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812679852] [2021-12-07 01:40:56,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-07 01:40:56,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-07 01:40:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=6230, Unknown=0, NotChecked=0, Total=6806 [2021-12-07 01:40:56,073 INFO L87 Difference]: Start difference. First operand 1214 states and 1359 transitions. Second operand has 83 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 83 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:41:07,624 INFO L93 Difference]: Finished difference Result 1943 states and 2086 transitions. [2021-12-07 01:41:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-12-07 01:41:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 83 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-07 01:41:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:41:07,626 INFO L225 Difference]: With dead ends: 1943 [2021-12-07 01:41:07,626 INFO L226 Difference]: Without dead ends: 1671 [2021-12-07 01:41:07,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14991 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=7646, Invalid=45946, Unknown=0, NotChecked=0, Total=53592 [2021-12-07 01:41:07,628 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 2755 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 4410 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2755 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 4410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:41:07,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2755 Valid, 1702 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 4410 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 01:41:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-12-07 01:41:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1158. [2021-12-07 01:41:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1156 states have (on average 1.1089965397923875) internal successors, (1282), 1157 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1282 transitions. [2021-12-07 01:41:07,637 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1282 transitions. Word has length 98 [2021-12-07 01:41:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:41:07,637 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 1282 transitions. [2021-12-07 01:41:07,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 83 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1282 transitions. [2021-12-07 01:41:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-07 01:41:07,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:41:07,638 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:41:07,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-07 01:41:07,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:07,839 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:41:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:41:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 129995140, now seen corresponding path program 10 times [2021-12-07 01:41:07,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:41:07,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342733383] [2021-12-07 01:41:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:41:07,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:41:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:41:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 98 proven. 507 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:41:08,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:41:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342733383] [2021-12-07 01:41:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342733383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:41:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932619541] [2021-12-07 01:41:08,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:41:08,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:08,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:41:08,378 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:41:08,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-07 01:41:08,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:41:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:41:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-07 01:41:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:41:08,565 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 [2021-12-07 01:41:09,209 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 17 treesize of output 13 [2021-12-07 01:41:09,283 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 20 treesize of output 22 [2021-12-07 01:41:14,779 INFO L354 Elim1Store]: treesize reduction 1207, result has 6.4 percent of original size [2021-12-07 01:41:14,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 151 treesize of output 140 [2021-12-07 01:41:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 267 proven. 338 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:41:16,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:41:19,931 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3011 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3011) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2021-12-07 01:41:19,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:41:19,949 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 363 treesize of output 181 [2021-12-07 01:41:20,258 INFO L354 Elim1Store]: treesize reduction 1148, result has 10.9 percent of original size [2021-12-07 01:41:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 361 treesize of output 409 [2021-12-07 01:41:20,294 INFO L354 Elim1Store]: treesize reduction 1066, result has 0.1 percent of original size [2021-12-07 01:41:20,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 153 treesize of output 99 [2021-12-07 01:41:21,958 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 [2021-12-07 01:41:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 280 proven. 325 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 01:41:21,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932619541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:41:21,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:41:21,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 48, 48] total 121 [2021-12-07 01:41:21,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991705481] [2021-12-07 01:41:21,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:41:21,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-07 01:41:21,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:41:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-07 01:41:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1507, Invalid=12776, Unknown=1, NotChecked=236, Total=14520 [2021-12-07 01:41:21,965 INFO L87 Difference]: Start difference. First operand 1158 states and 1282 transitions. Second operand has 121 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:41:27,398 INFO L93 Difference]: Finished difference Result 1429 states and 1579 transitions. [2021-12-07 01:41:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-07 01:41:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-07 01:41:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:41:27,400 INFO L225 Difference]: With dead ends: 1429 [2021-12-07 01:41:27,400 INFO L226 Difference]: Without dead ends: 1365 [2021-12-07 01:41:27,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 178 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 7451 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=3085, Invalid=28780, Unknown=1, NotChecked=354, Total=32220 [2021-12-07 01:41:27,401 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 891 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:41:27,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1333 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2366 Invalid, 0 Unknown, 454 Unchecked, 0.8s Time] [2021-12-07 01:41:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-12-07 01:41:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1327. [2021-12-07 01:41:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1325 states have (on average 1.110188679245283) internal successors, (1471), 1326 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1471 transitions. [2021-12-07 01:41:27,410 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1471 transitions. Word has length 99 [2021-12-07 01:41:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:41:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 1471 transitions. [2021-12-07 01:41:27,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1471 transitions. [2021-12-07 01:41:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-07 01:41:27,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:41:27,412 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:41:27,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-07 01:41:27,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:27,613 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:41:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:41:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -914655647, now seen corresponding path program 11 times [2021-12-07 01:41:27,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:41:27,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816105553] [2021-12-07 01:41:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:41:27,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:41:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:41:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 75 proven. 588 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:41:28,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:41:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816105553] [2021-12-07 01:41:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816105553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:41:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644960467] [2021-12-07 01:41:28,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:41:28,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:28,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:41:28,151 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:41:28,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-07 01:41:28,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-07 01:41:28,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:41:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-07 01:41:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:41:28,400 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:41:28,400 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 [2021-12-07 01:41:29,083 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 17 treesize of output 13 [2021-12-07 01:41:29,158 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:41:29,159 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-07 01:41:29,170 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 3 [2021-12-07 01:41:29,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:41:29,902 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 13 treesize of output 13 [2021-12-07 01:41:30,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:41:30,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:41:30,851 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 10 [2021-12-07 01:41:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 75 proven. 588 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:41:30,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:41:31,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:41:31,284 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 26 treesize of output 27 [2021-12-07 01:41:31,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:41:31,287 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 40 treesize of output 40 [2021-12-07 01:41:31,289 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 [2021-12-07 01:41:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 75 proven. 588 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:41:32,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644960467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:41:32,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:41:32,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 39] total 97 [2021-12-07 01:41:32,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031694505] [2021-12-07 01:41:32,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:41:32,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-07 01:41:32,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:41:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-07 01:41:32,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=9044, Unknown=1, NotChecked=0, Total=9312 [2021-12-07 01:41:32,672 INFO L87 Difference]: Start difference. First operand 1327 states and 1471 transitions. Second operand has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 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) [2021-12-07 01:41:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:41:39,674 INFO L93 Difference]: Finished difference Result 2770 states and 2962 transitions. [2021-12-07 01:41:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-07 01:41:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 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) Word has length 103 [2021-12-07 01:41:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:41:39,677 INFO L225 Difference]: With dead ends: 2770 [2021-12-07 01:41:39,677 INFO L226 Difference]: Without dead ends: 2669 [2021-12-07 01:41:39,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 147 SyntacticMatches, 6 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1029, Invalid=28726, Unknown=1, NotChecked=0, Total=29756 [2021-12-07 01:41:39,678 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 791 mSDsluCounter, 10522 mSDsCounter, 0 mSdLazyCounter, 10125 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 10714 SdHoareTripleChecker+Invalid, 13532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 10125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3214 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:41:39,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 10714 Invalid, 13532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 10125 Invalid, 0 Unknown, 3214 Unchecked, 2.6s Time] [2021-12-07 01:41:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-12-07 01:41:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1496. [2021-12-07 01:41:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1494 states have (on average 1.1111111111111112) internal successors, (1660), 1495 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1660 transitions. [2021-12-07 01:41:39,692 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1660 transitions. Word has length 103 [2021-12-07 01:41:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:41:39,693 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1660 transitions. [2021-12-07 01:41:39,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 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) [2021-12-07 01:41:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1660 transitions. [2021-12-07 01:41:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-07 01:41:39,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:41:39,694 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:41:39,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-07 01:41:39,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-07 01:41:39,895 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:41:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:41:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1244065671, now seen corresponding path program 12 times [2021-12-07 01:41:39,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:41:39,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243669982] [2021-12-07 01:41:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:41:39,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:41:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:41:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 157 proven. 220 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:41:40,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:41:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243669982] [2021-12-07 01:41:40,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243669982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:41:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027402852] [2021-12-07 01:41:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:41:40,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:41:40,325 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:41:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-07 01:41:41,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-07 01:41:41,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:41:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-07 01:41:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:41:41,756 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:41:41,756 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 [2021-12-07 01:41:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 66 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:41:43,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:41:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 231 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:41:46,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027402852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:41:46,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:41:46,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 38, 38] total 103 [2021-12-07 01:41:46,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441125121] [2021-12-07 01:41:46,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:41:46,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-07 01:41:46,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:41:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-07 01:41:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=9727, Unknown=0, NotChecked=0, Total=10712 [2021-12-07 01:41:46,331 INFO L87 Difference]: Start difference. First operand 1496 states and 1660 transitions. Second operand has 104 states, 103 states have (on average 2.8932038834951457) internal successors, (298), 104 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:42:07,826 INFO L93 Difference]: Finished difference Result 2329 states and 2505 transitions. [2021-12-07 01:42:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-12-07 01:42:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.8932038834951457) internal successors, (298), 104 states have internal predecessors, (298), 0 states have call successors, (0), 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 104 [2021-12-07 01:42:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:42:07,829 INFO L225 Difference]: With dead ends: 2329 [2021-12-07 01:42:07,829 INFO L226 Difference]: Without dead ends: 2157 [2021-12-07 01:42:07,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20772 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=17799, Invalid=68343, Unknown=0, NotChecked=0, Total=86142 [2021-12-07 01:42:07,839 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1664 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 6169 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 7369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 6169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:42:07,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 2041 Invalid, 7369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 6169 Invalid, 0 Unknown, 566 Unchecked, 2.4s Time] [2021-12-07 01:42:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-12-07 01:42:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1340. [2021-12-07 01:42:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1338 states have (on average 1.1068759342301944) internal successors, (1481), 1339 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1481 transitions. [2021-12-07 01:42:07,850 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1481 transitions. Word has length 104 [2021-12-07 01:42:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:42:07,850 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 1481 transitions. [2021-12-07 01:42:07,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.8932038834951457) internal successors, (298), 104 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1481 transitions. [2021-12-07 01:42:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-07 01:42:07,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:42:07,852 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:42:07,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-07 01:42:08,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-07 01:42:08,053 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:42:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:42:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -825252674, now seen corresponding path program 12 times [2021-12-07 01:42:08,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:42:08,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163723232] [2021-12-07 01:42:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:42:08,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:42:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 48 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:42:08,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:42:08,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163723232] [2021-12-07 01:42:08,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163723232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:42:08,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210093727] [2021-12-07 01:42:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:42:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:42:08,618 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:42:08,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-07 01:42:09,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-07 01:42:09,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:42:09,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-07 01:42:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:42:09,379 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 [2021-12-07 01:42:09,920 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 17 treesize of output 13 [2021-12-07 01:42:09,980 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 20 treesize of output 22 [2021-12-07 01:42:10,153 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 [2021-12-07 01:42:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 48 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:42:10,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:42:10,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3253) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 15)) 0)) is different from false [2021-12-07 01:42:10,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:42:10,254 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 26 treesize of output 27 [2021-12-07 01:42:10,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:42:10,257 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 40 treesize of output 40 [2021-12-07 01:42:10,259 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 [2021-12-07 01:42:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 48 proven. 675 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:42:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210093727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:42:10,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:42:10,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 64 [2021-12-07 01:42:10,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958849691] [2021-12-07 01:42:10,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:42:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-07 01:42:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:42:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-07 01:42:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3741, Unknown=1, NotChecked=122, Total=4032 [2021-12-07 01:42:10,539 INFO L87 Difference]: Start difference. First operand 1340 states and 1481 transitions. Second operand has 64 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:42:13,451 INFO L93 Difference]: Finished difference Result 3169 states and 3369 transitions. [2021-12-07 01:42:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-07 01:42:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 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 107 [2021-12-07 01:42:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:42:13,454 INFO L225 Difference]: With dead ends: 3169 [2021-12-07 01:42:13,454 INFO L226 Difference]: Without dead ends: 3097 [2021-12-07 01:42:13,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=282, Invalid=6363, Unknown=1, NotChecked=160, Total=6806 [2021-12-07 01:42:13,455 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 448 mSDsluCounter, 8774 mSDsCounter, 0 mSdLazyCounter, 8897 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 8993 SdHoareTripleChecker+Invalid, 9518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:42:13,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 8993 Invalid, 9518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8897 Invalid, 0 Unknown, 571 Unchecked, 2.2s Time] [2021-12-07 01:42:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-12-07 01:42:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 1529. [2021-12-07 01:42:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1527 states have (on average 1.1093647675180092) internal successors, (1694), 1528 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1694 transitions. [2021-12-07 01:42:13,470 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1694 transitions. Word has length 107 [2021-12-07 01:42:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:42:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1694 transitions. [2021-12-07 01:42:13,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1694 transitions. [2021-12-07 01:42:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 01:42:13,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:42:13,472 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:42:13,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-07 01:42:13,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:13,673 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:42:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:42:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 419691022, now seen corresponding path program 13 times [2021-12-07 01:42:13,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:42:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277920802] [2021-12-07 01:42:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:42:13,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:42:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 6 proven. 324 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:42:14,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:42:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277920802] [2021-12-07 01:42:14,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277920802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:42:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22341760] [2021-12-07 01:42:14,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:42:14,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:14,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:42:14,242 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:42:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-07 01:42:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-07 01:42:14,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:42:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:42:14,406 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 [2021-12-07 01:42:14,408 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 [2021-12-07 01:42:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 153 proven. 177 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:42:16,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:42:18,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:42:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 190 proven. 140 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:42:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22341760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:42:18,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:42:18,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 96 [2021-12-07 01:42:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624619494] [2021-12-07 01:42:18,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:42:18,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-07 01:42:18,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:42:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-07 01:42:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=8651, Unknown=0, NotChecked=0, Total=9312 [2021-12-07 01:42:18,483 INFO L87 Difference]: Start difference. First operand 1529 states and 1694 transitions. Second operand has 97 states, 96 states have (on average 3.03125) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:42:32,590 INFO L93 Difference]: Finished difference Result 2630 states and 2802 transitions. [2021-12-07 01:42:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-07 01:42:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.03125) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-07 01:42:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:42:32,592 INFO L225 Difference]: With dead ends: 2630 [2021-12-07 01:42:32,592 INFO L226 Difference]: Without dead ends: 2252 [2021-12-07 01:42:32,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15462 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=8026, Invalid=55730, Unknown=0, NotChecked=0, Total=63756 [2021-12-07 01:42:32,594 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 4243 mSDsluCounter, 3477 mSDsCounter, 0 mSdLazyCounter, 7692 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4243 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 8793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:42:32,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4243 Valid, 3556 Invalid, 8793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7692 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-07 01:42:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-12-07 01:42:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1470. [2021-12-07 01:42:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1468 states have (on average 1.0974114441416893) internal successors, (1611), 1469 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 1611 transitions. [2021-12-07 01:42:32,605 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 1611 transitions. Word has length 108 [2021-12-07 01:42:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:42:32,605 INFO L470 AbstractCegarLoop]: Abstraction has 1470 states and 1611 transitions. [2021-12-07 01:42:32,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.03125) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 1611 transitions. [2021-12-07 01:42:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-07 01:42:32,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:42:32,607 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:42:32,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-07 01:42:32,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-07 01:42:32,808 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:42:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:42:32,809 INFO L85 PathProgramCache]: Analyzing trace with hash -459258428, now seen corresponding path program 14 times [2021-12-07 01:42:32,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:42:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167379289] [2021-12-07 01:42:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:42:32,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:42:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 127 proven. 93 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 01:42:33,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:42:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167379289] [2021-12-07 01:42:33,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167379289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:42:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941467483] [2021-12-07 01:42:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:42:33,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:42:33,026 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:42:33,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-07 01:42:33,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:42:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:42:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:42:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:42:33,171 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:42:33,172 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 [2021-12-07 01:42:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 141 proven. 79 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 01:42:33,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:42:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 133 proven. 87 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 01:42:33,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941467483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:42:33,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:42:33,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2021-12-07 01:42:33,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851628098] [2021-12-07 01:42:33,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:42:33,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:42:33,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:42:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:42:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1743, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 01:42:33,868 INFO L87 Difference]: Start difference. First operand 1470 states and 1611 transitions. Second operand has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:42:34,456 INFO L93 Difference]: Finished difference Result 1652 states and 1791 transitions. [2021-12-07 01:42:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 01:42:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 0 states have call successors, (0), 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 110 [2021-12-07 01:42:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:42:34,457 INFO L225 Difference]: With dead ends: 1652 [2021-12-07 01:42:34,457 INFO L226 Difference]: Without dead ends: 1517 [2021-12-07 01:42:34,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=3769, Unknown=0, NotChecked=0, Total=4692 [2021-12-07 01:42:34,458 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 182 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:42:34,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 486 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:42:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-12-07 01:42:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1494. [2021-12-07 01:42:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1492 states have (on average 1.094504021447721) internal successors, (1633), 1493 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1633 transitions. [2021-12-07 01:42:34,470 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1633 transitions. Word has length 110 [2021-12-07 01:42:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:42:34,470 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 1633 transitions. [2021-12-07 01:42:34,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1633 transitions. [2021-12-07 01:42:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-07 01:42:34,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:42:34,472 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:42:34,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-07 01:42:34,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:34,673 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:42:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:42:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash -600948917, now seen corresponding path program 15 times [2021-12-07 01:42:34,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:42:34,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378296417] [2021-12-07 01:42:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:42:34,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:42:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 18 proven. 182 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:42:35,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:42:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378296417] [2021-12-07 01:42:35,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378296417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:42:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276088716] [2021-12-07 01:42:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:42:35,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:42:35,103 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:42:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-07 01:42:36,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-07 01:42:36,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:42:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-07 01:42:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:42:36,086 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:42:36,086 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 [2021-12-07 01:42:36,093 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 [2021-12-07 01:42:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 45 proven. 155 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:42:37,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:42:40,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:42:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 66 proven. 134 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:42:40,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276088716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:42:40,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:42:40,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34, 34] total 89 [2021-12-07 01:42:40,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352955650] [2021-12-07 01:42:40,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:42:40,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-07 01:42:40,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:42:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-07 01:42:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=7311, Unknown=0, NotChecked=0, Total=8010 [2021-12-07 01:42:40,596 INFO L87 Difference]: Start difference. First operand 1494 states and 1633 transitions. Second operand has 90 states, 89 states have (on average 2.932584269662921) internal successors, (261), 90 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) [2021-12-07 01:42:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:42:54,451 INFO L93 Difference]: Finished difference Result 1871 states and 2006 transitions. [2021-12-07 01:42:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-07 01:42:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 2.932584269662921) internal successors, (261), 90 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) Word has length 110 [2021-12-07 01:42:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:42:54,453 INFO L225 Difference]: With dead ends: 1871 [2021-12-07 01:42:54,453 INFO L226 Difference]: Without dead ends: 1792 [2021-12-07 01:42:54,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18862 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=11191, Invalid=54601, Unknown=0, NotChecked=0, Total=65792 [2021-12-07 01:42:54,456 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1886 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 5187 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 6102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 5187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:42:54,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1886 Valid, 1257 Invalid, 6102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 5187 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 01:42:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-12-07 01:42:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1373. [2021-12-07 01:42:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1371 states have (on average 1.0955506929248724) internal successors, (1502), 1372 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:42:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 1502 transitions. [2021-12-07 01:42:54,465 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 1502 transitions. Word has length 110 [2021-12-07 01:42:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:42:54,465 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 1502 transitions. [2021-12-07 01:42:54,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 2.932584269662921) internal successors, (261), 90 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) [2021-12-07 01:42:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 1502 transitions. [2021-12-07 01:42:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 01:42:54,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:42:54,467 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:42:54,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-07 01:42:54,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:54,668 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:42:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:42:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1753523045, now seen corresponding path program 13 times [2021-12-07 01:42:54,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:42:54,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592370937] [2021-12-07 01:42:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:42:54,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:42:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 378 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:42:55,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:42:55,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592370937] [2021-12-07 01:42:55,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592370937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:42:55,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254577408] [2021-12-07 01:42:55,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:42:55,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:42:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:42:55,189 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:42:55,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-07 01:42:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:42:55,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-07 01:42:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:42:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:42:55,350 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 [2021-12-07 01:42:55,353 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 [2021-12-07 01:42:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 435 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:42:56,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:42:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:42:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 496 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:42:58,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254577408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:42:58,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:42:58,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 109 [2021-12-07 01:42:58,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968885196] [2021-12-07 01:42:58,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:42:58,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-07 01:42:58,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:42:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-07 01:42:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=10723, Unknown=0, NotChecked=0, Total=11990 [2021-12-07 01:42:58,220 INFO L87 Difference]: Start difference. First operand 1373 states and 1502 transitions. Second operand has 110 states, 109 states have (on average 2.963302752293578) internal successors, (323), 110 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:43:01,865 INFO L93 Difference]: Finished difference Result 3162 states and 3330 transitions. [2021-12-07 01:43:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-07 01:43:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 2.963302752293578) internal successors, (323), 110 states have internal predecessors, (323), 0 states have call successors, (0), 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 111 [2021-12-07 01:43:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:43:01,866 INFO L225 Difference]: With dead ends: 3162 [2021-12-07 01:43:01,867 INFO L226 Difference]: Without dead ends: 3048 [2021-12-07 01:43:01,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5658 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4778, Invalid=21304, Unknown=0, NotChecked=0, Total=26082 [2021-12-07 01:43:01,868 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1392 mSDsluCounter, 4349 mSDsCounter, 0 mSdLazyCounter, 5900 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 4516 SdHoareTripleChecker+Invalid, 6163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 5900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:43:01,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1392 Valid, 4516 Invalid, 6163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 5900 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:43:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-12-07 01:43:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 1441. [2021-12-07 01:43:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1439 states have (on average 1.0882557331480194) internal successors, (1566), 1440 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1566 transitions. [2021-12-07 01:43:01,880 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1566 transitions. Word has length 111 [2021-12-07 01:43:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:43:01,880 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 1566 transitions. [2021-12-07 01:43:01,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 2.963302752293578) internal successors, (323), 110 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1566 transitions. [2021-12-07 01:43:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-07 01:43:01,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:43:01,881 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:43:01,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-07 01:43:02,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:02,083 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:43:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:43:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1508465612, now seen corresponding path program 14 times [2021-12-07 01:43:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:43:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67053812] [2021-12-07 01:43:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:43:02,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:43:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:43:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 51 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:43:02,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:43:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67053812] [2021-12-07 01:43:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67053812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:43:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740494731] [2021-12-07 01:43:02,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:43:02,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:43:02,704 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:43:02,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-07 01:43:02,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:43:02,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:43:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-07 01:43:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:43:02,870 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 [2021-12-07 01:43:03,505 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 17 treesize of output 13 [2021-12-07 01:43:03,565 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 20 treesize of output 22 [2021-12-07 01:43:03,744 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 [2021-12-07 01:43:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 51 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:43:03,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:43:03,845 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3701 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3701) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 16)) 0)) is different from false [2021-12-07 01:43:03,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:43:03,849 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 26 treesize of output 27 [2021-12-07 01:43:03,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:43:03,852 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 40 treesize of output 40 [2021-12-07 01:43:03,857 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 [2021-12-07 01:43:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 51 proven. 768 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:43:04,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740494731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:43:04,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:43:04,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 67 [2021-12-07 01:43:04,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320333714] [2021-12-07 01:43:04,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:43:04,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 01:43:04,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:43:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 01:43:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4118, Unknown=1, NotChecked=128, Total=4422 [2021-12-07 01:43:04,141 INFO L87 Difference]: Start difference. First operand 1441 states and 1566 transitions. Second operand has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 67 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:43:08,195 INFO L93 Difference]: Finished difference Result 3179 states and 3359 transitions. [2021-12-07 01:43:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-07 01:43:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 67 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-07 01:43:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:43:08,197 INFO L225 Difference]: With dead ends: 3179 [2021-12-07 01:43:08,197 INFO L226 Difference]: Without dead ends: 3103 [2021-12-07 01:43:08,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=732, Invalid=13077, Unknown=1, NotChecked=232, Total=14042 [2021-12-07 01:43:08,198 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 940 mSDsluCounter, 8674 mSDsCounter, 0 mSdLazyCounter, 9339 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 8898 SdHoareTripleChecker+Invalid, 9965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 9339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:43:08,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 8898 Invalid, 9965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 9339 Invalid, 0 Unknown, 361 Unchecked, 2.3s Time] [2021-12-07 01:43:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-12-07 01:43:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1592. [2021-12-07 01:43:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1590 states have (on average 1.090566037735849) internal successors, (1734), 1591 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1734 transitions. [2021-12-07 01:43:08,211 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1734 transitions. Word has length 113 [2021-12-07 01:43:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:43:08,211 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1734 transitions. [2021-12-07 01:43:08,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 67 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1734 transitions. [2021-12-07 01:43:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:43:08,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:43:08,213 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:43:08,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-12-07 01:43:08,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:08,414 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:43:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:43:08,415 INFO L85 PathProgramCache]: Analyzing trace with hash -616156837, now seen corresponding path program 16 times [2021-12-07 01:43:08,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:43:08,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251991740] [2021-12-07 01:43:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:43:08,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:43:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:43:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 235 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 01:43:08,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:43:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251991740] [2021-12-07 01:43:08,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251991740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:43:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141944217] [2021-12-07 01:43:08,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:43:08,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:08,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:43:08,982 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:43:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-07 01:43:09,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:43:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:43:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-07 01:43:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:43:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:09,169 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:43:09,169 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 [2021-12-07 01:43:09,180 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 [2021-12-07 01:43:09,556 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 17 treesize of output 13 [2021-12-07 01:43:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:09,603 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 20 treesize of output 22 [2021-12-07 01:43:12,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:12,112 INFO L354 Elim1Store]: treesize reduction 65, result has 59.1 percent of original size [2021-12-07 01:43:12,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 136 [2021-12-07 01:43:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-12-07 01:43:13,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:43:18,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:43:18,620 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 261 treesize of output 135 [2021-12-07 01:43:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:43:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 265 treesize of output 355 [2021-12-07 01:43:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 111 treesize of output 71 [2021-12-07 01:43:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:31,056 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 [2021-12-07 01:43:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-12-07 01:43:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141944217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:43:31,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:43:31,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 39] total 107 [2021-12-07 01:43:31,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129875937] [2021-12-07 01:43:31,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:43:31,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-07 01:43:31,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:43:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-07 01:43:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=10480, Unknown=1, NotChecked=0, Total=11556 [2021-12-07 01:43:31,079 INFO L87 Difference]: Start difference. First operand 1592 states and 1734 transitions. Second operand has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:43:46,966 INFO L93 Difference]: Finished difference Result 2394 states and 2615 transitions. [2021-12-07 01:43:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-07 01:43:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-07 01:43:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:43:46,968 INFO L225 Difference]: With dead ends: 2394 [2021-12-07 01:43:46,968 INFO L226 Difference]: Without dead ends: 2068 [2021-12-07 01:43:46,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11774 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=4902, Invalid=40253, Unknown=1, NotChecked=0, Total=45156 [2021-12-07 01:43:46,970 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 260 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 2467 SdHoareTripleChecker+Invalid, 4382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:43:46,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 2467 Invalid, 4382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3927 Invalid, 0 Unknown, 358 Unchecked, 2.0s Time] [2021-12-07 01:43:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-12-07 01:43:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1445. [2021-12-07 01:43:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1443 states have (on average 1.1212751212751213) internal successors, (1618), 1444 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 1618 transitions. [2021-12-07 01:43:46,984 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 1618 transitions. Word has length 116 [2021-12-07 01:43:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:43:46,984 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 1618 transitions. [2021-12-07 01:43:46,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 1618 transitions. [2021-12-07 01:43:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:43:46,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:43:46,986 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:43:47,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-07 01:43:47,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:47,187 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:43:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:43:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1100890705, now seen corresponding path program 15 times [2021-12-07 01:43:47,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:43:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346918690] [2021-12-07 01:43:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:43:47,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:43:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:43:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 435 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:43:47,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:43:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346918690] [2021-12-07 01:43:47,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346918690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:43:47,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956366713] [2021-12-07 01:43:47,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:43:47,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:43:47,723 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:43:47,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-07 01:43:48,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-07 01:43:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:43:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 01:43:48,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:43:48,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:43:48,711 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 [2021-12-07 01:43:48,713 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 [2021-12-07 01:43:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 496 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:43:50,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:43:51,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:43:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 561 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:43:51,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956366713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:43:51,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:43:51,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 115 [2021-12-07 01:43:51,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328752967] [2021-12-07 01:43:51,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:43:51,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-07 01:43:51,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:43:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-07 01:43:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1708, Invalid=11632, Unknown=0, NotChecked=0, Total=13340 [2021-12-07 01:43:51,922 INFO L87 Difference]: Start difference. First operand 1445 states and 1618 transitions. Second operand has 116 states, 115 states have (on average 2.965217391304348) internal successors, (341), 116 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:43:55,826 INFO L93 Difference]: Finished difference Result 3204 states and 3410 transitions. [2021-12-07 01:43:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 01:43:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 2.965217391304348) internal successors, (341), 116 states have internal predecessors, (341), 0 states have call successors, (0), 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 117 [2021-12-07 01:43:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:43:55,828 INFO L225 Difference]: With dead ends: 3204 [2021-12-07 01:43:55,828 INFO L226 Difference]: Without dead ends: 3176 [2021-12-07 01:43:55,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5880 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5892, Invalid=23864, Unknown=0, NotChecked=0, Total=29756 [2021-12-07 01:43:55,829 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 1747 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 4179 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 3186 SdHoareTripleChecker+Invalid, 4501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 4179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:43:55,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 3186 Invalid, 4501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 4179 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 01:43:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-12-07 01:43:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 1461. [2021-12-07 01:43:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1459 states have (on average 1.1144619602467443) internal successors, (1626), 1460 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1626 transitions. [2021-12-07 01:43:55,842 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1626 transitions. Word has length 117 [2021-12-07 01:43:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:43:55,842 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1626 transitions. [2021-12-07 01:43:55,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 2.965217391304348) internal successors, (341), 116 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:43:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1626 transitions. [2021-12-07 01:43:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-07 01:43:55,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:43:55,844 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:43:55,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-07 01:43:56,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:56,045 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:43:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:43:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1394013290, now seen corresponding path program 16 times [2021-12-07 01:43:56,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:43:56,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871674676] [2021-12-07 01:43:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:43:56,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:43:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:43:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 54 proven. 867 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:43:56,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:43:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871674676] [2021-12-07 01:43:56,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871674676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:43:56,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429682930] [2021-12-07 01:43:56,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:43:56,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:43:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:43:56,703 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:43:56,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-07 01:43:56,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:43:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:43:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-07 01:43:56,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:43:56,978 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:43:56,978 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 [2021-12-07 01:43:57,768 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 17 treesize of output 13 [2021-12-07 01:43:57,894 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-07 01:43:57,895 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:44:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:03,480 INFO L354 Elim1Store]: treesize reduction 144, result has 45.0 percent of original size [2021-12-07 01:44:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 153 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 37 case distinctions, treesize of input 165 treesize of output 195 [2021-12-07 01:47:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:47:13,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:47:21,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:47:21,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 153 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 0 case distinctions, treesize of input 1089 treesize of output 983 [2021-12-07 01:49:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:49:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429682930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:49:59,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:49:59,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 44, 44] total 128 [2021-12-07 01:49:59,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860118197] [2021-12-07 01:49:59,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:49:59,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-07 01:49:59,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:49:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-07 01:49:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=14616, Unknown=0, NotChecked=0, Total=16256 [2021-12-07 01:49:59,415 INFO L87 Difference]: Start difference. First operand 1461 states and 1626 transitions. Second operand has 128 states, 128 states have (on average 1.7421875) internal successors, (223), 128 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:50:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:50:30,292 INFO L93 Difference]: Finished difference Result 3690 states and 3912 transitions. [2021-12-07 01:50:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-12-07 01:50:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.7421875) internal successors, (223), 128 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-07 01:50:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:50:30,294 INFO L225 Difference]: With dead ends: 3690 [2021-12-07 01:50:30,294 INFO L226 Difference]: Without dead ends: 3532 [2021-12-07 01:50:30,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13705 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=6087, Invalid=58174, Unknown=1, NotChecked=0, Total=64262 [2021-12-07 01:50:30,297 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1620 mSDsluCounter, 10901 mSDsCounter, 0 mSdLazyCounter, 14632 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 11101 SdHoareTripleChecker+Invalid, 17413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 14632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2264 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:50:30,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 11101 Invalid, 17413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 14632 Invalid, 0 Unknown, 2264 Unchecked, 7.5s Time] [2021-12-07 01:50:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-12-07 01:50:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 1610. [2021-12-07 01:50:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1608 states have (on average 1.1119402985074627) internal successors, (1788), 1609 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:50:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 1788 transitions. [2021-12-07 01:50:30,319 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 1788 transitions. Word has length 119 [2021-12-07 01:50:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:50:30,319 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 1788 transitions. [2021-12-07 01:50:30,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.7421875) internal successors, (223), 128 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:50:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 1788 transitions. [2021-12-07 01:50:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:50:30,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:50:30,321 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:50:30,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-07 01:50:30,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:50:30,522 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:50:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:50:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 303731170, now seen corresponding path program 17 times [2021-12-07 01:50:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:50:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412325746] [2021-12-07 01:50:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:50:30,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:50:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:50:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 6 proven. 456 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:50:31,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:50:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412325746] [2021-12-07 01:50:31,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412325746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:50:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108089035] [2021-12-07 01:50:31,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:50:31,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:50:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:50:31,191 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:50:31,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ad65eb-cc49-408a-8e86-7e60d988b4d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-07 01:50:31,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-07 01:50:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:50:31,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-07 01:50:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:50:31,843 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 [2021-12-07 01:50:31,845 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 [2021-12-07 01:50:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 231 proven. 231 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:50:34,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:50:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:50:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 276 proven. 186 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:50:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108089035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:50:37,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:50:37,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 109 [2021-12-07 01:50:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957045090] [2021-12-07 01:50:37,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:50:37,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-07 01:50:37,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:50:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-07 01:50:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=11185, Unknown=0, NotChecked=0, Total=11990 [2021-12-07 01:50:37,103 INFO L87 Difference]: Start difference. First operand 1610 states and 1788 transitions. Second operand has 110 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)