./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-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_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/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_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/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_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/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 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:07:21,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:07:21,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:07:21,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:07:21,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:07:21,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:07:21,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:07:21,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:07:21,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:07:21,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:07:21,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:07:21,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:07:21,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:07:21,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:07:21,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:07:21,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:07:21,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:07:21,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:07:21,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:07:21,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:07:21,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:07:21,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:07:21,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:07:21,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:07:21,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:07:21,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:07:21,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:07:21,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:07:21,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:07:21,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:07:21,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:07:21,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:07:21,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:07:21,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:07:21,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:07:21,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:07:21,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:07:21,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:07:21,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:07:21,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:07:21,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:07:21,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 00:07:21,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:07:21,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:07:21,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:07:21,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:07:21,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:07:21,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:07:21,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:07:21,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:07:21,371 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:07:21,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:07:21,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:07:21,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 00:07:21,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:07:21,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:07:21,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:07:21,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 00:07:21,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 00:07:21,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 00:07:21,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:07:21,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:07:21,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:07:21,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:07:21,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:07:21,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:07:21,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:07:21,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:07:21,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:07:21,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:07:21,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:07:21,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:07:21,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:07:21,381 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_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2021-12-07 00:07:21,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:07:21,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:07:21,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:07:21,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:07:21,597 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:07:21,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-12-07 00:07:21,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/data/823c4a8e9/80fc395499a34efdb40524c0c698d4a9/FLAG7cf755833 [2021-12-07 00:07:22,040 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:07:22,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-12-07 00:07:22,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/data/823c4a8e9/80fc395499a34efdb40524c0c698d4a9/FLAG7cf755833 [2021-12-07 00:07:22,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/data/823c4a8e9/80fc395499a34efdb40524c0c698d4a9 [2021-12-07 00:07:22,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:07:22,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:07:22,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:07:22,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:07:22,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:07:22,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d6f3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22, skipping insertion in model container [2021-12-07 00:07:22,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:07:22,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:07:22,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:07:22,294 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:07:22,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:07:22,343 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:07:22,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22 WrapperNode [2021-12-07 00:07:22,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:07:22,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:07:22,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:07:22,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:07:22,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,378 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-12-07 00:07:22,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:07:22,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:07:22,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:07:22,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:07:22,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:07:22,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:07:22,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:07:22,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:07:22,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (1/1) ... [2021-12-07 00:07:22,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:07:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:22,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:07:22,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:07:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:07:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:07:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:07:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:07:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:07:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:07:22,530 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:07:22,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:07:22,682 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:07:22,687 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:07:22,687 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 00:07:22,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:07:22 BoogieIcfgContainer [2021-12-07 00:07:22,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:07:22,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:07:22,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:07:22,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:07:22,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:07:22" (1/3) ... [2021-12-07 00:07:22,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2ca725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:07:22, skipping insertion in model container [2021-12-07 00:07:22,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:22" (2/3) ... [2021-12-07 00:07:22,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2ca725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:07:22, skipping insertion in model container [2021-12-07 00:07:22,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:07:22" (3/3) ... [2021-12-07 00:07:22,700 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2021-12-07 00:07:22,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:07:22,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-07 00:07:22,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:07:22,738 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 00:07:22,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-07 00:07:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:07:22,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:22,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:22,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-07 00:07:22,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:22,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420064386] [2021-12-07 00:07:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:22,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:22,895 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 00:07:22,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:22,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420064386] [2021-12-07 00:07:22,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420064386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:22,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:22,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:07:22,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021503342] [2021-12-07 00:07:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:22,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:22,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:22,923 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:07:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:22,956 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-12-07 00:07:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:07:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:22,967 INFO L225 Difference]: With dead ends: 76 [2021-12-07 00:07:22,967 INFO L226 Difference]: Without dead ends: 72 [2021-12-07 00:07:22,968 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 00:07:22,972 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:22,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-07 00:07:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2021-12-07 00:07:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 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 00:07:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-07 00:07:23,007 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2021-12-07 00:07:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-07 00:07:23,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:07:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-07 00:07:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:07:23,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:07:23,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-07 00:07:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299423991] [2021-12-07 00:07:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,075 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 00:07:23,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299423991] [2021-12-07 00:07:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299423991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:07:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263368719] [2021-12-07 00:07:23,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:07:23,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:07:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:07:23,079 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,103 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-07 00:07:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:07:23,103 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 00:07:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,104 INFO L225 Difference]: With dead ends: 41 [2021-12-07 00:07:23,104 INFO L226 Difference]: Without dead ends: 41 [2021-12-07 00:07:23,105 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 00:07:23,107 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-07 00:07:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-07 00:07:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-07 00:07:23,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2021-12-07 00:07:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,113 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-07 00:07:23,113 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 00:07:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-07 00:07:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:07:23,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:07:23,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-07 00:07:23,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000518268] [2021-12-07 00:07:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,180 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 00:07:23,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000518268] [2021-12-07 00:07:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000518268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:07:23,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509263870] [2021-12-07 00:07:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:23,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:23,183 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 00:07:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,243 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-12-07 00:07:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:23,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 00:07:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,245 INFO L225 Difference]: With dead ends: 73 [2021-12-07 00:07:23,245 INFO L226 Difference]: Without dead ends: 73 [2021-12-07 00:07:23,245 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 00:07:23,246 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-07 00:07:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-12-07 00:07:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-07 00:07:23,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2021-12-07 00:07:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,251 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-07 00:07:23,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 00:07:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-07 00:07:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:07:23,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:07:23,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-07 00:07:23,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497457562] [2021-12-07 00:07:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,296 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 00:07:23,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497457562] [2021-12-07 00:07:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497457562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:07:23,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450856921] [2021-12-07 00:07:23,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:23,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:23,299 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,322 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-07 00:07:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-07 00:07:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,324 INFO L225 Difference]: With dead ends: 42 [2021-12-07 00:07:23,324 INFO L226 Difference]: Without dead ends: 42 [2021-12-07 00:07:23,324 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 00:07:23,326 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-07 00:07:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-07 00:07:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.53125) internal successors, (49), 41 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 00:07:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-07 00:07:23,336 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2021-12-07 00:07:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,337 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-07 00:07:23,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-07 00:07:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:07:23,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:07:23,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-07 00:07:23,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589572160] [2021-12-07 00:07:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,377 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 00:07:23,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589572160] [2021-12-07 00:07:23,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589572160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:07:23,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399394929] [2021-12-07 00:07:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:23,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:23,380 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,400 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-07 00:07:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-07 00:07:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,402 INFO L225 Difference]: With dead ends: 74 [2021-12-07 00:07:23,402 INFO L226 Difference]: Without dead ends: 74 [2021-12-07 00:07:23,402 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 00:07:23,403 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 102 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 00:07:23,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-07 00:07:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-12-07 00:07:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4651162790697674) 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 00:07:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-07 00:07:23,409 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 9 [2021-12-07 00:07:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,410 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-07 00:07:23,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-07 00:07:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:07:23,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:07:23,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-07 00:07:23,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464729987] [2021-12-07 00:07:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,439 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 00:07:23,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464729987] [2021-12-07 00:07:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464729987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:07:23,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917111212] [2021-12-07 00:07:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:07:23,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:07:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:07:23,441 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,456 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-07 00:07:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:07:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-07 00:07:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,457 INFO L225 Difference]: With dead ends: 51 [2021-12-07 00:07:23,457 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 00:07:23,458 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 00:07:23,459 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 00:07:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-07 00:07:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-12-07 00:07:23,464 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 9 [2021-12-07 00:07:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-12-07 00:07:23,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-12-07 00:07:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:07:23,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:07:23,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-07 00:07:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532969481] [2021-12-07 00:07:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,522 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 00:07:23,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532969481] [2021-12-07 00:07:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532969481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:07:23,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828096289] [2021-12-07 00:07:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:07:23,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:07:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:07:23,524 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,568 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-12-07 00:07:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:07:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-07 00:07:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,569 INFO L225 Difference]: With dead ends: 74 [2021-12-07 00:07:23,569 INFO L226 Difference]: Without dead ends: 74 [2021-12-07 00:07:23,570 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 00:07:23,570 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-07 00:07:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-12-07 00:07:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 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 00:07:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-07 00:07:23,574 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2021-12-07 00:07:23,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,574 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-07 00:07:23,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-07 00:07:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 00:07:23,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:07:23,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-07 00:07:23,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631576414] [2021-12-07 00:07:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,614 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 00:07:23,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631576414] [2021-12-07 00:07:23,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631576414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:23,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:23,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:07:23,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407534166] [2021-12-07 00:07:23,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:23,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:23,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:23,616 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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 00:07:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:23,633 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-07 00:07:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 00:07:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:23,634 INFO L225 Difference]: With dead ends: 52 [2021-12-07 00:07:23,634 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 00:07:23,634 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 00:07:23,634 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:23,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 00:07:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 00:07:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 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 00:07:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-07 00:07:23,638 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2021-12-07 00:07:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:23,638 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-07 00:07:23,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 00:07:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-07 00:07:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:07:23,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:23,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:23,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:07:23,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-07 00:07:23,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091692430] [2021-12-07 00:07:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,688 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 00:07:23,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091692430] [2021-12-07 00:07:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091692430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582854867] [2021-12-07 00:07:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:23,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:23,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:07:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:07:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:07:23,817 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 00:07:23,824 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 00:07:23,887 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 00:07:23,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:24,027 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 00:07:24,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582854867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:24,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:24,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-07 00:07:24,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919467860] [2021-12-07 00:07:24,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:24,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:07:24,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:07:24,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:07:24,029 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:24,128 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2021-12-07 00:07:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:07:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-07 00:07:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:24,130 INFO L225 Difference]: With dead ends: 113 [2021-12-07 00:07:24,130 INFO L226 Difference]: Without dead ends: 113 [2021-12-07 00:07:24,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:07:24,131 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 164 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:24,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 209 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-07 00:07:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2021-12-07 00:07:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-07 00:07:24,137 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2021-12-07 00:07:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:24,137 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-07 00:07:24,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-07 00:07:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:07:24,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:24,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:24,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:07:24,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:24,339 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2021-12-07 00:07:24,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:24,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996365241] [2021-12-07 00:07:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:24,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:24,371 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 00:07:24,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996365241] [2021-12-07 00:07:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996365241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:24,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:24,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:07:24,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533408530] [2021-12-07 00:07:24,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:07:24,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:07:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:07:24,372 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 00:07:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:24,396 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-07 00:07:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:07:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 00:07:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:24,397 INFO L225 Difference]: With dead ends: 46 [2021-12-07 00:07:24,397 INFO L226 Difference]: Without dead ends: 46 [2021-12-07 00:07:24,397 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 00:07:24,398 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:24,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-07 00:07:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-07 00:07:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-07 00:07:24,401 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2021-12-07 00:07:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:24,401 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-07 00:07:24,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 00:07:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-07 00:07:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:07:24,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:24,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:24,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 00:07:24,402 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2021-12-07 00:07:24,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763691811] [2021-12-07 00:07:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:24,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:24,459 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 00:07:24,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763691811] [2021-12-07 00:07:24,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763691811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:24,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:24,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:07:24,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137677910] [2021-12-07 00:07:24,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:24,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:07:24,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:07:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:07:24,462 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 00:07:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:24,516 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-07 00:07:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:07:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 00:07:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:24,517 INFO L225 Difference]: With dead ends: 49 [2021-12-07 00:07:24,517 INFO L226 Difference]: Without dead ends: 49 [2021-12-07 00:07:24,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:07:24,518 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:24,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-07 00:07:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-12-07 00:07:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 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 00:07:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-07 00:07:24,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2021-12-07 00:07:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:24,521 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-07 00:07:24,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 00:07:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-07 00:07:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:07:24,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:24,522 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:24,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:07:24,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-07 00:07:24,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:24,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473354702] [2021-12-07 00:07:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:24,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:24,575 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 00:07:24,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473354702] [2021-12-07 00:07:24,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473354702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941404128] [2021-12-07 00:07:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:24,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:24,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:24,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:07:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:24,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:07:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:24,633 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:07:24,633 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 00:07:24,691 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 00:07:24,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:24,820 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 00:07:24,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941404128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:24,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:24,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-07 00:07:24,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326429587] [2021-12-07 00:07:24,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:24,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:07:24,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:07:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:07:24,821 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 00:07:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:24,903 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-12-07 00:07:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:07:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 13 [2021-12-07 00:07:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:24,904 INFO L225 Difference]: With dead ends: 88 [2021-12-07 00:07:24,905 INFO L226 Difference]: Without dead ends: 88 [2021-12-07 00:07:24,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 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 00:07:24,906 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:24,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 151 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-07 00:07:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2021-12-07 00:07:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-07 00:07:24,909 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2021-12-07 00:07:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:24,909 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-07 00:07:24,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 00:07:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-07 00:07:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:07:24,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:24,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:24,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:07:25,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:07:25,111 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2021-12-07 00:07:25,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122139943] [2021-12-07 00:07:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,168 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 00:07:25,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122139943] [2021-12-07 00:07:25,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122139943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:07:25,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859215608] [2021-12-07 00:07:25,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:07:25,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:07:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:07:25,171 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:25,226 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-07 00:07:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:07:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-07 00:07:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:25,227 INFO L225 Difference]: With dead ends: 45 [2021-12-07 00:07:25,227 INFO L226 Difference]: Without dead ends: 45 [2021-12-07 00:07:25,227 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 00:07:25,228 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:25,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-07 00:07:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-07 00:07:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-07 00:07:25,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2021-12-07 00:07:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-07 00:07:25,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-07 00:07:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:07:25,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:25,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:25,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:07:25,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2021-12-07 00:07:25,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481569388] [2021-12-07 00:07:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,290 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 00:07:25,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481569388] [2021-12-07 00:07:25,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481569388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:07:25,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70328234] [2021-12-07 00:07:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:07:25,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:07:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:07:25,292 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:25,343 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-07 00:07:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:07:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-07 00:07:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:25,345 INFO L225 Difference]: With dead ends: 48 [2021-12-07 00:07:25,345 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 00:07:25,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:07:25,345 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:25,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 00:07:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-07 00:07:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 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 00:07:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-07 00:07:25,348 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2021-12-07 00:07:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:25,349 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-07 00:07:25,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-07 00:07:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:07:25,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:25,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:25,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:07:25,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2021-12-07 00:07:25,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837363989] [2021-12-07 00:07:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,409 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 00:07:25,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837363989] [2021-12-07 00:07:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837363989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:07:25,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101530416] [2021-12-07 00:07:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:07:25,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:07:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:25,410 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:25,423 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-07 00:07:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:07:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:07:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:25,424 INFO L225 Difference]: With dead ends: 45 [2021-12-07 00:07:25,424 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 00:07:25,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:07:25,425 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:25,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 00:07:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-07 00:07:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-07 00:07:25,427 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2021-12-07 00:07:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:25,427 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-07 00:07:25,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-07 00:07:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:07:25,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:25,428 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:25,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:07:25,428 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2021-12-07 00:07:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6391949] [2021-12-07 00:07:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:25,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6391949] [2021-12-07 00:07:25,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6391949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:07:25,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015789875] [2021-12-07 00:07:25,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:07:25,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:07:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:07:25,522 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:25,627 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-12-07 00:07:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:07:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 00:07:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:25,628 INFO L225 Difference]: With dead ends: 66 [2021-12-07 00:07:25,628 INFO L226 Difference]: Without dead ends: 66 [2021-12-07 00:07:25,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:07:25,629 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:25,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 181 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:07:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-07 00:07:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-12-07 00:07:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 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 00:07:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-12-07 00:07:25,632 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2021-12-07 00:07:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-12-07 00:07:25,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-12-07 00:07:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:07:25,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:25,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:25,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:07:25,634 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2021-12-07 00:07:25,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324782764] [2021-12-07 00:07:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:25,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324782764] [2021-12-07 00:07:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324782764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:07:25,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210586461] [2021-12-07 00:07:25,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:07:25,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:07:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:07:25,722 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:25,870 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-12-07 00:07:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:07:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 00:07:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:25,871 INFO L225 Difference]: With dead ends: 96 [2021-12-07 00:07:25,871 INFO L226 Difference]: Without dead ends: 81 [2021-12-07 00:07:25,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:07:25,872 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:25,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 213 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-07 00:07:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-12-07 00:07:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-12-07 00:07:25,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2021-12-07 00:07:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:25,876 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-12-07 00:07:25,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-12-07 00:07:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:07:25,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:25,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:25,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:07:25,877 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2021-12-07 00:07:25,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:25,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228720455] [2021-12-07 00:07:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:25,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:25,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228720455] [2021-12-07 00:07:25,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228720455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:25,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:07:25,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394554954] [2021-12-07 00:07:25,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:25,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:07:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:07:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:07:25,991 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:26,148 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-12-07 00:07:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:07:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 00:07:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:26,149 INFO L225 Difference]: With dead ends: 117 [2021-12-07 00:07:26,149 INFO L226 Difference]: Without dead ends: 106 [2021-12-07 00:07:26,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:07:26,150 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:26,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 188 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-07 00:07:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2021-12-07 00:07:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-12-07 00:07:26,152 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2021-12-07 00:07:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:26,152 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-12-07 00:07:26,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-12-07 00:07:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:07:26,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:26,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 00:07:26,153 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2021-12-07 00:07:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505903593] [2021-12-07 00:07:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:26,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:26,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505903593] [2021-12-07 00:07:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505903593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:07:26,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:07:26,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 00:07:26,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738989444] [2021-12-07 00:07:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:07:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:07:26,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:07:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:07:26,263 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:26,451 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2021-12-07 00:07:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:07:26,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 00:07:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:26,452 INFO L225 Difference]: With dead ends: 118 [2021-12-07 00:07:26,452 INFO L226 Difference]: Without dead ends: 105 [2021-12-07 00:07:26,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:07:26,453 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:26,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 179 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-07 00:07:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2021-12-07 00:07:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 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 00:07:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-12-07 00:07:26,456 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2021-12-07 00:07:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-12-07 00:07:26,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-12-07 00:07:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:07:26,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:26,456 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:26,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:07:26,457 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2021-12-07 00:07:26,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552541452] [2021-12-07 00:07:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:26,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:26,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552541452] [2021-12-07 00:07:26,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552541452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759745690] [2021-12-07 00:07:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:26,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:26,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:26,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:07:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-07 00:07:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:26,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:26,779 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 00:07:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759745690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:26,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:26,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-12-07 00:07:26,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871685503] [2021-12-07 00:07:26,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:26,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:07:26,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:26,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:07:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:07:26,799 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 00:07:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:27,003 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-12-07 00:07:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:07:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 25 [2021-12-07 00:07:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:27,004 INFO L225 Difference]: With dead ends: 101 [2021-12-07 00:07:27,004 INFO L226 Difference]: Without dead ends: 101 [2021-12-07 00:07:27,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:07:27,005 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 211 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:27,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 194 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-07 00:07:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-12-07 00:07:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-12-07 00:07:27,009 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2021-12-07 00:07:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:27,009 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-12-07 00:07:27,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 00:07:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-12-07 00:07:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:07:27,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:27,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:27,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:07:27,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-07 00:07:27,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2021-12-07 00:07:27,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:27,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493703527] [2021-12-07 00:07:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:27,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:27,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:27,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493703527] [2021-12-07 00:07:27,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493703527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:27,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863562571] [2021-12-07 00:07:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:27,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:27,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:27,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:27,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:07:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:07:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:07:27,480 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 00:07:27,483 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 00:07:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:27,746 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 00:07:27,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863562571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:27,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:27,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-07 00:07:27,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499768131] [2021-12-07 00:07:27,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:27,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:07:27,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:07:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:07:27,748 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:27,960 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-12-07 00:07:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:07:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-07 00:07:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:27,961 INFO L225 Difference]: With dead ends: 119 [2021-12-07 00:07:27,961 INFO L226 Difference]: Without dead ends: 119 [2021-12-07 00:07:27,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:07:27,962 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 224 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:27,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 184 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-07 00:07:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-12-07 00:07:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 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 00:07:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-12-07 00:07:27,965 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2021-12-07 00:07:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:27,965 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-12-07 00:07:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-12-07 00:07:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:07:27,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:27,966 INFO L514 BasicCegarLoop]: trace histogram [3, 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 00:07:27,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:07:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:28,168 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2021-12-07 00:07:28,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915185650] [2021-12-07 00:07:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:28,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:28,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915185650] [2021-12-07 00:07:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915185650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577186582] [2021-12-07 00:07:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:07:28,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:28,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:28,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:07:28,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:07:28,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:07:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:28,625 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 00:07:28,747 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 00:07:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:28,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:28,822 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 13 [2021-12-07 00:07:28,823 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 26 treesize of output 22 [2021-12-07 00:07:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:28,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577186582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:28,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:28,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 29 [2021-12-07 00:07:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445118805] [2021-12-07 00:07:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:07:28,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:07:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:07:28,914 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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 00:07:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:29,560 INFO L93 Difference]: Finished difference Result 207 states and 224 transitions. [2021-12-07 00:07:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:07:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) Word has length 30 [2021-12-07 00:07:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:29,561 INFO L225 Difference]: With dead ends: 207 [2021-12-07 00:07:29,562 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 00:07:29,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 00:07:29,563 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 207 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:29,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 615 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 479 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2021-12-07 00:07:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 00:07:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2021-12-07 00:07:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 132 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 00:07:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2021-12-07 00:07:29,566 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 30 [2021-12-07 00:07:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:29,566 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2021-12-07 00:07:29,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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 00:07:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2021-12-07 00:07:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 00:07:29,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:29,567 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:29,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:07:29,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:29,768 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2021-12-07 00:07:29,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867597325] [2021-12-07 00:07:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:29,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:30,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867597325] [2021-12-07 00:07:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867597325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621762820] [2021-12-07 00:07:30,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:07:30,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:30,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:30,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:07:30,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:07:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:07:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:30,109 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 00:07:30,201 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 00:07:30,231 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 00:07:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:07:30,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:30,428 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 15 treesize of output 10 [2021-12-07 00:07:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:30,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_20| Int) (v_ArrVal_256 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_20| 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_20|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_256) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_20| 1)) 0))) is different from false [2021-12-07 00:07:30,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:30,650 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 00:07:30,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:30,655 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 00:07:30,659 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 00:07:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621762820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:30,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:30,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2021-12-07 00:07:30,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511173320] [2021-12-07 00:07:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:30,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 00:07:30,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 00:07:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1583, Unknown=1, NotChecked=80, Total=1806 [2021-12-07 00:07:30,911 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:31,859 INFO L93 Difference]: Finished difference Result 237 states and 259 transitions. [2021-12-07 00:07:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:07:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 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 00:07:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:31,861 INFO L225 Difference]: With dead ends: 237 [2021-12-07 00:07:31,861 INFO L226 Difference]: Without dead ends: 210 [2021-12-07 00:07:31,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=519, Invalid=3906, Unknown=1, NotChecked=130, Total=4556 [2021-12-07 00:07:31,863 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 218 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:31,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 821 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 720 Invalid, 0 Unknown, 252 Unchecked, 0.2s Time] [2021-12-07 00:07:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-07 00:07:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 185. [2021-12-07 00:07:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.1311475409836065) internal successors, (207), 184 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2021-12-07 00:07:31,868 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 33 [2021-12-07 00:07:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:31,868 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2021-12-07 00:07:31,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2021-12-07 00:07:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 00:07:31,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:31,869 INFO L514 BasicCegarLoop]: trace histogram [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 00:07:31,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:07:32,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:07:32,070 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -740881566, now seen corresponding path program 3 times [2021-12-07 00:07:32,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:32,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086606080] [2021-12-07 00:07:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:32,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:32,203 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 00:07:32,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086606080] [2021-12-07 00:07:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086606080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90121596] [2021-12-07 00:07:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:07:32,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:32,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:32,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:07:32,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:07:32,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 00:07:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:32,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:07:32,276 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 00:07:32,322 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 00:07:32,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:32,675 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 00:07:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:07:32,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:33,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-07 00:07:33,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-07 00:07:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:07:33,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90121596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:33,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:33,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2021-12-07 00:07:33,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622899599] [2021-12-07 00:07:33,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:33,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:07:33,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:07:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:07:33,317 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 31 states, 30 states have (on average 2.8) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:33,917 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-12-07 00:07:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:07:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-07 00:07:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:33,918 INFO L225 Difference]: With dead ends: 209 [2021-12-07 00:07:33,918 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 00:07:33,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2021-12-07 00:07:33,919 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 309 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2021-12-07 00:07:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 00:07:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 160. [2021-12-07 00:07:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.1139240506329113) internal successors, (176), 159 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-12-07 00:07:33,923 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 34 [2021-12-07 00:07:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:33,923 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-12-07 00:07:33,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-12-07 00:07:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:07:33,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:33,924 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:33,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:07:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 00:07:34,125 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2021-12-07 00:07:34,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:34,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631690137] [2021-12-07 00:07:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:34,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:34,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:34,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631690137] [2021-12-07 00:07:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631690137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:34,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029606141] [2021-12-07 00:07:34,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:07:34,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:34,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:34,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:07:34,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:07:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:34,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 00:07:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:07:34,324 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 00:07:34,326 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 00:07:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:34,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:34,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029606141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:34,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:34,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-07 00:07:34,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572143024] [2021-12-07 00:07:34,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:34,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 00:07:34,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 00:07:34,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:07:34,737 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 27 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 00:07:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:35,022 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2021-12-07 00:07:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:07:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 27 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 00:07:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:35,023 INFO L225 Difference]: With dead ends: 187 [2021-12-07 00:07:35,023 INFO L226 Difference]: Without dead ends: 187 [2021-12-07 00:07:35,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:07:35,024 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 186 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:35,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 329 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:07:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-07 00:07:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-12-07 00:07:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.1160220994475138) internal successors, (202), 182 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 202 transitions. [2021-12-07 00:07:35,028 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 202 transitions. Word has length 37 [2021-12-07 00:07:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:35,028 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 202 transitions. [2021-12-07 00:07:35,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 27 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 00:07:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 202 transitions. [2021-12-07 00:07:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 00:07:35,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:35,029 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:35,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:07:35,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 00:07:35,230 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2021-12-07 00:07:35,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821402088] [2021-12-07 00:07:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:35,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:35,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821402088] [2021-12-07 00:07:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821402088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729129446] [2021-12-07 00:07:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:07:35,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:35,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:35,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:07:35,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:07:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:35,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-07 00:07:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:35,521 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 00:07:35,524 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 00:07:35,640 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 00:07:35,672 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 00:07:35,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:07:35,952 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 00:07:35,955 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 00:07:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:35,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:36,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:36,263 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 00:07:36,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:36,268 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 00:07:36,272 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 00:07:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:36,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729129446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:36,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:36,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2021-12-07 00:07:36,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672625119] [2021-12-07 00:07:36,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:36,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:07:36,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:36,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:07:36,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1270, Unknown=16, NotChecked=0, Total=1406 [2021-12-07 00:07:36,573 INFO L87 Difference]: Start difference. First operand 183 states and 202 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:37,093 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2021-12-07 00:07:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 00:07:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 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 00:07:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:37,094 INFO L225 Difference]: With dead ends: 296 [2021-12-07 00:07:37,094 INFO L226 Difference]: Without dead ends: 267 [2021-12-07 00:07:37,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=3063, Unknown=16, NotChecked=0, Total=3422 [2021-12-07 00:07:37,095 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 133 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:37,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 772 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2021-12-07 00:07:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-07 00:07:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2021-12-07 00:07:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 258 states have (on average 1.124031007751938) internal successors, (290), 259 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2021-12-07 00:07:37,101 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 45 [2021-12-07 00:07:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2021-12-07 00:07:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2021-12-07 00:07:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 00:07:37,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:37,101 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-12-07 00:07:37,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:07:37,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:07:37,303 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1868812785, now seen corresponding path program 1 times [2021-12-07 00:07:37,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:37,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646174560] [2021-12-07 00:07:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:37,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:37,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646174560] [2021-12-07 00:07:37,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646174560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:37,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396213196] [2021-12-07 00:07:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:37,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:37,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:37,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:07:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 00:07:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:37,553 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 00:07:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:07:37,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:37,971 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 00:07:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:37,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:38,147 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 13 [2021-12-07 00:07:38,148 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 26 treesize of output 22 [2021-12-07 00:07:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396213196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:38,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:38,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 30 [2021-12-07 00:07:38,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633641946] [2021-12-07 00:07:38,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:38,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:07:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:07:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:07:38,290 INFO L87 Difference]: Start difference. First operand 260 states and 290 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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 00:07:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:39,028 INFO L93 Difference]: Finished difference Result 341 states and 370 transitions. [2021-12-07 00:07:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-07 00:07:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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) Word has length 46 [2021-12-07 00:07:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:39,030 INFO L225 Difference]: With dead ends: 341 [2021-12-07 00:07:39,030 INFO L226 Difference]: Without dead ends: 309 [2021-12-07 00:07:39,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=3355, Unknown=0, NotChecked=0, Total=3782 [2021-12-07 00:07:39,031 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:39,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 462 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 403 Invalid, 0 Unknown, 381 Unchecked, 0.1s Time] [2021-12-07 00:07:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-07 00:07:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 270. [2021-12-07 00:07:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1156716417910448) internal successors, (299), 269 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 299 transitions. [2021-12-07 00:07:39,038 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 299 transitions. Word has length 46 [2021-12-07 00:07:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:39,038 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 299 transitions. [2021-12-07 00:07:39,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 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 00:07:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 299 transitions. [2021-12-07 00:07:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:07:39,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:39,039 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:39,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:07:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:07:39,240 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -317764404, now seen corresponding path program 2 times [2021-12-07 00:07:39,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:39,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577713001] [2021-12-07 00:07:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:39,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:39,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577713001] [2021-12-07 00:07:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577713001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325444473] [2021-12-07 00:07:39,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:07:39,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:39,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:39,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:07:39,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:07:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 00:07:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:39,516 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 00:07:40,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:40,073 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 00:07:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:07:40,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:40,696 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 13 [2021-12-07 00:07:40,699 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 26 treesize of output 22 [2021-12-07 00:07:40,702 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 35 treesize of output 27 [2021-12-07 00:07:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325444473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:40,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:40,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 39 [2021-12-07 00:07:40,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336067567] [2021-12-07 00:07:40,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:40,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 00:07:40,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 00:07:40,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 00:07:40,726 INFO L87 Difference]: Start difference. First operand 270 states and 299 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 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 00:07:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:42,245 INFO L93 Difference]: Finished difference Result 519 states and 569 transitions. [2021-12-07 00:07:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-07 00:07:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 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 47 [2021-12-07 00:07:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:42,248 INFO L225 Difference]: With dead ends: 519 [2021-12-07 00:07:42,248 INFO L226 Difference]: Without dead ends: 490 [2021-12-07 00:07:42,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=551, Invalid=5301, Unknown=0, NotChecked=0, Total=5852 [2021-12-07 00:07:42,250 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:42,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 476 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-12-07 00:07:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-07 00:07:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 335. [2021-12-07 00:07:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 333 states have (on average 1.1141141141141142) internal successors, (371), 334 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2021-12-07 00:07:42,258 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 47 [2021-12-07 00:07:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:42,258 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2021-12-07 00:07:42,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 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 00:07:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2021-12-07 00:07:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 00:07:42,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:42,258 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:42,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:07:42,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:07:42,459 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 589899187, now seen corresponding path program 5 times [2021-12-07 00:07:42,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:42,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707835748] [2021-12-07 00:07:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:42,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:42,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707835748] [2021-12-07 00:07:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707835748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:42,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41604913] [2021-12-07 00:07:42,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:07:42,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:42,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:42,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:07:42,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:07:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 00:07:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:42,646 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:07:42,646 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 00:07:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:43,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:43,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41604913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:43,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:43,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-12-07 00:07:43,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714786210] [2021-12-07 00:07:43,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:43,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:07:43,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:07:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:07:43,768 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 35 states, 34 states have (on average 4.147058823529412) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:44,259 INFO L93 Difference]: Finished difference Result 407 states and 446 transitions. [2021-12-07 00:07:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 00:07:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.147058823529412) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-07 00:07:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:44,261 INFO L225 Difference]: With dead ends: 407 [2021-12-07 00:07:44,261 INFO L226 Difference]: Without dead ends: 407 [2021-12-07 00:07:44,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=2755, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 00:07:44,263 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:44,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 797 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2021-12-07 00:07:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-07 00:07:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 376. [2021-12-07 00:07:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 374 states have (on average 1.1149732620320856) internal successors, (417), 375 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 417 transitions. [2021-12-07 00:07:44,271 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 417 transitions. Word has length 49 [2021-12-07 00:07:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 417 transitions. [2021-12-07 00:07:44,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.147058823529412) internal successors, (141), 35 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 417 transitions. [2021-12-07 00:07:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 00:07:44,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:44,272 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:44,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:07:44,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 00:07:44,473 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 52758665, now seen corresponding path program 3 times [2021-12-07 00:07:44,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126236067] [2021-12-07 00:07:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:44,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:07:44,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126236067] [2021-12-07 00:07:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126236067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954400943] [2021-12-07 00:07:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:07:44,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:44,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:44,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:07:44,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:07:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:07:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:45,008 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 00:07:45,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:07:45,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:45,616 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 00:07:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:45,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:45,833 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 13 [2021-12-07 00:07:45,834 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 26 treesize of output 22 [2021-12-07 00:07:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:46,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954400943] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:46,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:46,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 43 [2021-12-07 00:07:46,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863771013] [2021-12-07 00:07:46,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 00:07:46,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 00:07:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 00:07:46,022 INFO L87 Difference]: Start difference. First operand 376 states and 417 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 00:07:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:47,398 INFO L93 Difference]: Finished difference Result 676 states and 732 transitions. [2021-12-07 00:07:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-07 00:07:47,398 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 56 [2021-12-07 00:07:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:47,401 INFO L225 Difference]: With dead ends: 676 [2021-12-07 00:07:47,401 INFO L226 Difference]: Without dead ends: 631 [2021-12-07 00:07:47,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=677, Invalid=6805, Unknown=0, NotChecked=0, Total=7482 [2021-12-07 00:07:47,403 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 283 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:47,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1147 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 598 Invalid, 0 Unknown, 497 Unchecked, 0.2s Time] [2021-12-07 00:07:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-12-07 00:07:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 524. [2021-12-07 00:07:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 522 states have (on average 1.1111111111111112) internal successors, (580), 523 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 580 transitions. [2021-12-07 00:07:47,412 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 580 transitions. Word has length 56 [2021-12-07 00:07:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:47,412 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 580 transitions. [2021-12-07 00:07:47,412 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 00:07:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 580 transitions. [2021-12-07 00:07:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 00:07:47,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:47,413 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:47,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:07:47,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:47,614 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -377019521, now seen corresponding path program 6 times [2021-12-07 00:07:47,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009942123] [2021-12-07 00:07:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:47,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:47,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009942123] [2021-12-07 00:07:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009942123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344649952] [2021-12-07 00:07:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:07:47,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:47,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:47,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:47,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:07:47,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:07:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 00:07:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:47,914 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 00:07:47,999 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 00:07:48,017 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 00:07:48,135 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 00:07:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:48,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:48,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_506 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_506) |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 00:07:48,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:48,208 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 00:07:48,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:48,212 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 00:07:48,214 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 00:07:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344649952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:48,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-12-07 00:07:48,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106541496] [2021-12-07 00:07:48,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 00:07:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 00:07:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2021-12-07 00:07:48,372 INFO L87 Difference]: Start difference. First operand 524 states and 580 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:48,956 INFO L93 Difference]: Finished difference Result 801 states and 874 transitions. [2021-12-07 00:07:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:07:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 0 states have call successors, (0), 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 00:07:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:48,959 INFO L225 Difference]: With dead ends: 801 [2021-12-07 00:07:48,959 INFO L226 Difference]: Without dead ends: 634 [2021-12-07 00:07:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=2146, Unknown=1, NotChecked=96, Total=2550 [2021-12-07 00:07:48,960 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 242 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 1453 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 994 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2021-12-07 00:07:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-07 00:07:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 602. [2021-12-07 00:07:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 600 states have (on average 1.1116666666666666) internal successors, (667), 601 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 667 transitions. [2021-12-07 00:07:48,968 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 667 transitions. Word has length 57 [2021-12-07 00:07:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:48,968 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 667 transitions. [2021-12-07 00:07:48,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 667 transitions. [2021-12-07 00:07:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 00:07:48,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:48,969 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:48,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:07:49,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:49,170 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -233026202, now seen corresponding path program 4 times [2021-12-07 00:07:49,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636664937] [2021-12-07 00:07:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:49,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:07:49,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636664937] [2021-12-07 00:07:49,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636664937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72340902] [2021-12-07 00:07:49,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:07:49,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:49,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:49,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:07:49,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:07:49,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:07:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 00:07:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:49,446 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 6 treesize of output 5 [2021-12-07 00:07:49,619 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 00:07:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:07:49,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:07:49,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72340902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:49,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:49,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 37 [2021-12-07 00:07:49,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866200618] [2021-12-07 00:07:49,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:49,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:07:49,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:07:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:07:49,843 INFO L87 Difference]: Start difference. First operand 602 states and 667 transitions. Second operand has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 37 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 00:07:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:52,076 INFO L93 Difference]: Finished difference Result 1063 states and 1148 transitions. [2021-12-07 00:07:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-07 00:07:52,076 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 37 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 60 [2021-12-07 00:07:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:52,079 INFO L225 Difference]: With dead ends: 1063 [2021-12-07 00:07:52,080 INFO L226 Difference]: Without dead ends: 1024 [2021-12-07 00:07:52,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1558, Invalid=9784, Unknown=0, NotChecked=0, Total=11342 [2021-12-07 00:07:52,082 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 351 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:52,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1079 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:07:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-12-07 00:07:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 662. [2021-12-07 00:07:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 660 states have (on average 1.112121212121212) internal successors, (734), 661 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 734 transitions. [2021-12-07 00:07:52,092 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 734 transitions. Word has length 60 [2021-12-07 00:07:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:52,092 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 734 transitions. [2021-12-07 00:07:52,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7567567567567566) internal successors, (139), 37 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 00:07:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 734 transitions. [2021-12-07 00:07:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 00:07:52,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:52,093 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:52,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:07:52,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-07 00:07:52,295 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -424589822, now seen corresponding path program 7 times [2021-12-07 00:07:52,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199457342] [2021-12-07 00:07:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:52,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:52,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199457342] [2021-12-07 00:07:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199457342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916336801] [2021-12-07 00:07:52,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:07:52,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:52,473 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:52,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:07:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 00:07:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:52,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:52,895 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 00:07:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:07:52,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916336801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:52,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:52,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-07 00:07:52,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188270535] [2021-12-07 00:07:52,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:52,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:07:52,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:07:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:07:52,922 INFO L87 Difference]: Start difference. First operand 662 states and 734 transitions. Second operand has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:07:53,337 INFO L93 Difference]: Finished difference Result 762 states and 836 transitions. [2021-12-07 00:07:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:07:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-07 00:07:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:07:53,340 INFO L225 Difference]: With dead ends: 762 [2021-12-07 00:07:53,340 INFO L226 Difference]: Without dead ends: 762 [2021-12-07 00:07:53,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 00:07:53,341 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 295 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:07:53,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 888 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:07:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-12-07 00:07:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 726. [2021-12-07 00:07:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 724 states have (on average 1.1132596685082874) internal successors, (806), 725 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 806 transitions. [2021-12-07 00:07:53,350 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 806 transitions. Word has length 61 [2021-12-07 00:07:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:07:53,351 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 806 transitions. [2021-12-07 00:07:53,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:07:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 806 transitions. [2021-12-07 00:07:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:07:53,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:07:53,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:07:53,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:07:53,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:53,552 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:07:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:07:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1914242811, now seen corresponding path program 1 times [2021-12-07 00:07:53,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:07:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720618977] [2021-12-07 00:07:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:53,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:07:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 00:07:53,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:07:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720618977] [2021-12-07 00:07:53,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720618977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:07:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791321760] [2021-12-07 00:07:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:07:53,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:07:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:07:53,928 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:07:53,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:07:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:07:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-07 00:07:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:07:54,176 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 00:07:54,218 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:07:54,218 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 00:07:54,222 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 00:07:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:07:55,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:07:55,170 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 00:07:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 18 [2021-12-07 00:07:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 00:07:55,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:07:55,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:07:55,528 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 47 treesize of output 36 [2021-12-07 00:07:55,539 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-07 00:07:55,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 61 [2021-12-07 00:07:55,552 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-07 00:07:55,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-12-07 00:07:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 00:07:55,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791321760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:07:55,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:07:55,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-07 00:07:55,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488677287] [2021-12-07 00:07:55,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:07:55,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:07:55,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:07:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:07:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2479, Unknown=6, NotChecked=0, Total=2652 [2021-12-07 00:07:55,847 INFO L87 Difference]: Start difference. First operand 726 states and 806 transitions. Second operand has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:01,770 INFO L93 Difference]: Finished difference Result 722 states and 791 transitions. [2021-12-07 00:08:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 00:08:01,770 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-07 00:08:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:01,772 INFO L225 Difference]: With dead ends: 722 [2021-12-07 00:08:01,772 INFO L226 Difference]: Without dead ends: 623 [2021-12-07 00:08:01,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=559, Invalid=4979, Unknown=12, NotChecked=0, Total=5550 [2021-12-07 00:08:01,773 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 221 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:01,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 963 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 795 Invalid, 0 Unknown, 394 Unchecked, 0.3s Time] [2021-12-07 00:08:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-12-07 00:08:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 571. [2021-12-07 00:08:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 569 states have (on average 1.1142355008787346) internal successors, (634), 570 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 00:08:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 634 transitions. [2021-12-07 00:08:01,780 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 634 transitions. Word has length 64 [2021-12-07 00:08:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:01,780 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 634 transitions. [2021-12-07 00:08:01,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 634 transitions. [2021-12-07 00:08:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 00:08:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:01,781 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:01,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 00:08:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 00:08:01,982 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -200440626, now seen corresponding path program 8 times [2021-12-07 00:08:01,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358600761] [2021-12-07 00:08:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:01,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:02,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358600761] [2021-12-07 00:08:02,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358600761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258053608] [2021-12-07 00:08:02,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:08:02,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:02,257 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:02,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:08:02,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:08:02,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 00:08:02,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:02,337 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 00:08:02,483 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 00:08:02,516 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 00:08:02,632 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 00:08:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:02,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:02,726 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_647 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_647) |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 00:08:02,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:02,730 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 00:08:02,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:02,733 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 00:08:02,735 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 00:08:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:02,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258053608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:02,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:02,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-12-07 00:08:02,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199702567] [2021-12-07 00:08:02,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:02,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:08:02,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:08:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1025, Unknown=1, NotChecked=64, Total=1190 [2021-12-07 00:08:02,865 INFO L87 Difference]: Start difference. First operand 571 states and 634 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 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 00:08:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:03,372 INFO L93 Difference]: Finished difference Result 1008 states and 1103 transitions. [2021-12-07 00:08:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:08:03,372 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 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 69 [2021-12-07 00:08:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:03,375 INFO L225 Difference]: With dead ends: 1008 [2021-12-07 00:08:03,375 INFO L226 Difference]: Without dead ends: 802 [2021-12-07 00:08:03,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=2259, Unknown=1, NotChecked=96, Total=2550 [2021-12-07 00:08:03,376 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 120 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:03,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 2132 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1116 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2021-12-07 00:08:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-07 00:08:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 639. [2021-12-07 00:08:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 637 states have (on average 1.1114599686028257) internal successors, (708), 638 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 708 transitions. [2021-12-07 00:08:03,384 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 708 transitions. Word has length 69 [2021-12-07 00:08:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:03,384 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 708 transitions. [2021-12-07 00:08:03,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 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 00:08:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 708 transitions. [2021-12-07 00:08:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:08:03,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:03,385 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:03,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:08:03,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:03,586 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash -567414834, now seen corresponding path program 5 times [2021-12-07 00:08:03,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:03,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113448880] [2021-12-07 00:08:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:03,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-07 00:08:03,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113448880] [2021-12-07 00:08:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113448880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8965827] [2021-12-07 00:08:03,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:08:03,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:03,813 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:03,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:08:03,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:08:03,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:03,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 00:08:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:03,902 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 6 treesize of output 5 [2021-12-07 00:08:04,035 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 00:08:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:08:04,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:08:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8965827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:04,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:04,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 33 [2021-12-07 00:08:04,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811607318] [2021-12-07 00:08:04,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:04,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 00:08:04,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 00:08:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 00:08:04,202 INFO L87 Difference]: Start difference. First operand 639 states and 708 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:05,181 INFO L93 Difference]: Finished difference Result 950 states and 1031 transitions. [2021-12-07 00:08:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-07 00:08:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-07 00:08:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:05,185 INFO L225 Difference]: With dead ends: 950 [2021-12-07 00:08:05,185 INFO L226 Difference]: Without dead ends: 860 [2021-12-07 00:08:05,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=982, Invalid=6158, Unknown=0, NotChecked=0, Total=7140 [2021-12-07 00:08:05,185 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 327 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:05,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 649 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:08:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-07 00:08:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 664. [2021-12-07 00:08:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 662 states have (on average 1.1042296072507554) internal successors, (731), 663 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 00:08:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 731 transitions. [2021-12-07 00:08:05,193 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 731 transitions. Word has length 70 [2021-12-07 00:08:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:05,193 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 731 transitions. [2021-12-07 00:08:05,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 731 transitions. [2021-12-07 00:08:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 00:08:05,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:05,194 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:05,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:08:05,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:05,395 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash -165610799, now seen corresponding path program 9 times [2021-12-07 00:08:05,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:05,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555655603] [2021-12-07 00:08:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:05,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:05,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:05,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555655603] [2021-12-07 00:08:05,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555655603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:05,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089998703] [2021-12-07 00:08:05,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:08:05,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:05,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:05,604 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:05,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:08:05,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:08:05,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 00:08:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:05,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:06,192 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 00:08:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089998703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:06,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-07 00:08:06,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718044827] [2021-12-07 00:08:06,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 00:08:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 00:08:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:08:06,361 INFO L87 Difference]: Start difference. First operand 664 states and 731 transitions. Second operand has 41 states, 40 states have (on average 4.75) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:07,086 INFO L93 Difference]: Finished difference Result 890 states and 966 transitions. [2021-12-07 00:08:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 00:08:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.75) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 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 00:08:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:07,089 INFO L225 Difference]: With dead ends: 890 [2021-12-07 00:08:07,089 INFO L226 Difference]: Without dead ends: 890 [2021-12-07 00:08:07,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=767, Invalid=3139, Unknown=0, NotChecked=0, Total=3906 [2021-12-07 00:08:07,090 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 445 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:07,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1057 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:08:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-07 00:08:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 728. [2021-12-07 00:08:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 726 states have (on average 1.106060606060606) internal successors, (803), 727 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 803 transitions. [2021-12-07 00:08:07,101 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 803 transitions. Word has length 73 [2021-12-07 00:08:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:07,101 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 803 transitions. [2021-12-07 00:08:07,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.75) internal successors, (190), 41 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 803 transitions. [2021-12-07 00:08:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 00:08:07,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:07,103 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:07,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 00:08:07,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:07,304 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash -756245934, now seen corresponding path program 6 times [2021-12-07 00:08:07,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:07,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625483986] [2021-12-07 00:08:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:07,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 125 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:07,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625483986] [2021-12-07 00:08:07,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625483986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276535570] [2021-12-07 00:08:07,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:08:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:07,505 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:07,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:08:07,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:08:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-07 00:08:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:07,712 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 00:08:07,932 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 00:08:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 125 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:08,025 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 13 [2021-12-07 00:08:08,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-07 00:08:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 125 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:08,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276535570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:08,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:08,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-07 00:08:08,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567063921] [2021-12-07 00:08:08,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:08,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 00:08:08,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 00:08:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 00:08:08,115 INFO L87 Difference]: Start difference. First operand 728 states and 803 transitions. Second operand has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:08,742 INFO L93 Difference]: Finished difference Result 1662 states and 1797 transitions. [2021-12-07 00:08:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:08:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-07 00:08:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:08,747 INFO L225 Difference]: With dead ends: 1662 [2021-12-07 00:08:08,747 INFO L226 Difference]: Without dead ends: 1466 [2021-12-07 00:08:08,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=521, Invalid=2785, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 00:08:08,748 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 313 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:08,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1159 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 921 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-12-07 00:08:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-12-07 00:08:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 891. [2021-12-07 00:08:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 889 states have (on average 1.109111361079865) internal successors, (986), 890 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 986 transitions. [2021-12-07 00:08:08,758 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 986 transitions. Word has length 75 [2021-12-07 00:08:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 986 transitions. [2021-12-07 00:08:08,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 986 transitions. [2021-12-07 00:08:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 00:08:08,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:08,760 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:08,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:08:08,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-07 00:08:08,961 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:08,962 INFO L85 PathProgramCache]: Analyzing trace with hash -297998763, now seen corresponding path program 7 times [2021-12-07 00:08:08,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:08,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231606944] [2021-12-07 00:08:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:08,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 6 proven. 148 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:09,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231606944] [2021-12-07 00:08:09,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231606944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82482643] [2021-12-07 00:08:09,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:08:09,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:09,181 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:09,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:08:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 00:08:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 15 proven. 139 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:09,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:09,682 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 00:08:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 15 proven. 139 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:09,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82482643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:09,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:09,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-07 00:08:09,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871174335] [2021-12-07 00:08:09,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 00:08:09,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 00:08:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:08:09,711 INFO L87 Difference]: Start difference. First operand 891 states and 986 transitions. Second operand has 34 states, 33 states have (on average 4.121212121212121) internal successors, (136), 34 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 00:08:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:10,399 INFO L93 Difference]: Finished difference Result 1589 states and 1734 transitions. [2021-12-07 00:08:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:08:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.121212121212121) internal successors, (136), 34 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 79 [2021-12-07 00:08:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:10,405 INFO L225 Difference]: With dead ends: 1589 [2021-12-07 00:08:10,405 INFO L226 Difference]: Without dead ends: 1589 [2021-12-07 00:08:10,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=2329, Unknown=0, NotChecked=0, Total=2862 [2021-12-07 00:08:10,406 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 412 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:10,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 661 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:08:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-12-07 00:08:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 936. [2021-12-07 00:08:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 934 states have (on average 1.1124197002141327) internal successors, (1039), 935 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1039 transitions. [2021-12-07 00:08:10,417 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1039 transitions. Word has length 79 [2021-12-07 00:08:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:10,417 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1039 transitions. [2021-12-07 00:08:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.121212121212121) internal successors, (136), 34 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 00:08:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1039 transitions. [2021-12-07 00:08:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 00:08:10,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:10,418 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:10,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 00:08:10,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 00:08:10,619 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 635370141, now seen corresponding path program 10 times [2021-12-07 00:08:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:10,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549859366] [2021-12-07 00:08:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:10,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:11,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:11,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549859366] [2021-12-07 00:08:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549859366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875185983] [2021-12-07 00:08:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:08:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:11,067 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:08:11,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:08:11,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 00:08:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:11,153 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 00:08:11,156 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 00:08:11,414 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 00:08:11,460 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 00:08:12,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:08:12,012 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 00:08:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 93 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:12,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:12,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-07 00:08:12,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:12,704 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 00:08:12,707 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 00:08:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 92 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875185983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:13,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 61 [2021-12-07 00:08:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955542689] [2021-12-07 00:08:13,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:13,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-07 00:08:13,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-07 00:08:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3399, Unknown=6, NotChecked=0, Total=3660 [2021-12-07 00:08:13,327 INFO L87 Difference]: Start difference. First operand 936 states and 1039 transitions. Second operand has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:15,054 INFO L93 Difference]: Finished difference Result 1814 states and 2026 transitions. [2021-12-07 00:08:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-07 00:08:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 0 states have call successors, (0), 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 00:08:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:15,060 INFO L225 Difference]: With dead ends: 1814 [2021-12-07 00:08:15,060 INFO L226 Difference]: Without dead ends: 1761 [2021-12-07 00:08:15,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=968, Invalid=11236, Unknown=6, NotChecked=0, Total=12210 [2021-12-07 00:08:15,062 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 265 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:15,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1497 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 902 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-12-07 00:08:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-12-07 00:08:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1597. [2021-12-07 00:08:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1595 states have (on average 1.1134796238244513) internal successors, (1776), 1596 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 1776 transitions. [2021-12-07 00:08:15,078 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 1776 transitions. Word has length 81 [2021-12-07 00:08:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:15,078 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 1776 transitions. [2021-12-07 00:08:15,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.5901639344262297) internal successors, (219), 61 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 1776 transitions. [2021-12-07 00:08:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 00:08:15,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:15,080 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:15,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 00:08:15,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 00:08:15,281 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1545027261, now seen corresponding path program 8 times [2021-12-07 00:08:15,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921235145] [2021-12-07 00:08:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:15,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 59 proven. 168 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:08:15,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921235145] [2021-12-07 00:08:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921235145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770015390] [2021-12-07 00:08:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:08:15,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:15,550 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:15,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 00:08:15,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:08:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-07 00:08:15,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:15,764 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 00:08:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:08:16,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:16,679 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 00:08:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 18 proven. 178 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:16,994 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 13 [2021-12-07 00:08:16,995 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 26 treesize of output 22 [2021-12-07 00:08:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 18 proven. 178 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:08:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770015390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:17,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:17,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 54 [2021-12-07 00:08:17,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52340696] [2021-12-07 00:08:17,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:17,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-07 00:08:17,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-07 00:08:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2687, Unknown=0, NotChecked=0, Total=2862 [2021-12-07 00:08:17,278 INFO L87 Difference]: Start difference. First operand 1597 states and 1776 transitions. Second operand has 54 states, 54 states have (on average 3.3333333333333335) internal successors, (180), 54 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:20,923 INFO L93 Difference]: Finished difference Result 5351 states and 5810 transitions. [2021-12-07 00:08:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-07 00:08:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.3333333333333335) internal successors, (180), 54 states have internal predecessors, (180), 0 states have call successors, (0), 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 00:08:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:20,939 INFO L225 Difference]: With dead ends: 5351 [2021-12-07 00:08:20,939 INFO L226 Difference]: Without dead ends: 4931 [2021-12-07 00:08:20,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9329 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1780, Invalid=28670, Unknown=0, NotChecked=0, Total=30450 [2021-12-07 00:08:20,940 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 507 mSDsluCounter, 4989 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 5166 SdHoareTripleChecker+Invalid, 4403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:20,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 5166 Invalid, 4403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3382 Invalid, 0 Unknown, 942 Unchecked, 0.8s Time] [2021-12-07 00:08:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-12-07 00:08:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 2031. [2021-12-07 00:08:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2029 states have (on average 1.114342040413997) internal successors, (2261), 2030 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2261 transitions. [2021-12-07 00:08:20,973 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2261 transitions. Word has length 84 [2021-12-07 00:08:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:20,974 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2261 transitions. [2021-12-07 00:08:20,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.3333333333333335) internal successors, (180), 54 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2261 transitions. [2021-12-07 00:08:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 00:08:20,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:20,975 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:20,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 00:08:21,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-07 00:08:21,175 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash -738556896, now seen corresponding path program 11 times [2021-12-07 00:08:21,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:21,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741951066] [2021-12-07 00:08:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:21,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:21,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741951066] [2021-12-07 00:08:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741951066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500341760] [2021-12-07 00:08:21,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:08:21,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:21,341 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:21,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 00:08:21,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-07 00:08:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:21,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 00:08:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:21,459 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:08:21,459 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 00:08:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:08:21,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:08:21,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-12-07 00:08:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:22,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:22,691 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 31 treesize of output 27 [2021-12-07 00:08:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500341760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:23,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:23,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2021-12-07 00:08:23,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205728974] [2021-12-07 00:08:23,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:23,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-07 00:08:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-07 00:08:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 00:08:23,174 INFO L87 Difference]: Start difference. First operand 2031 states and 2261 transitions. Second operand has 60 states, 59 states have (on average 4.203389830508475) internal successors, (248), 60 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:24,474 INFO L93 Difference]: Finished difference Result 2209 states and 2450 transitions. [2021-12-07 00:08:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-07 00:08:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.203389830508475) internal successors, (248), 60 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-07 00:08:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:24,481 INFO L225 Difference]: With dead ends: 2209 [2021-12-07 00:08:24,481 INFO L226 Difference]: Without dead ends: 2209 [2021-12-07 00:08:24,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=773, Invalid=7783, Unknown=0, NotChecked=0, Total=8556 [2021-12-07 00:08:24,482 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 216 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:24,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1832 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1429 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2021-12-07 00:08:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-12-07 00:08:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2151. [2021-12-07 00:08:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2149 states have (on average 1.1154025127966496) internal successors, (2397), 2150 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 2397 transitions. [2021-12-07 00:08:24,504 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 2397 transitions. Word has length 85 [2021-12-07 00:08:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:24,504 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 2397 transitions. [2021-12-07 00:08:24,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.203389830508475) internal successors, (248), 60 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 2397 transitions. [2021-12-07 00:08:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 00:08:24,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:24,505 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:24,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 00:08:24,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:24,706 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2067645676, now seen corresponding path program 12 times [2021-12-07 00:08:24,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932737965] [2021-12-07 00:08:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:24,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:25,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932737965] [2021-12-07 00:08:25,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932737965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528397788] [2021-12-07 00:08:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:08:25,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:25,010 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:25,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 00:08:25,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 00:08:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:25,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-07 00:08:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:25,140 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 00:08:25,329 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 00:08:25,362 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 00:08:25,491 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 00:08:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:25,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:25,595 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_972 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_972) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-07 00:08:25,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:25,598 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 00:08:25,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:25,601 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 00:08:25,603 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 00:08:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:25,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528397788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:25,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:25,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-12-07 00:08:25,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716940067] [2021-12-07 00:08:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:25,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 00:08:25,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 00:08:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1449, Unknown=1, NotChecked=76, Total=1640 [2021-12-07 00:08:25,780 INFO L87 Difference]: Start difference. First operand 2151 states and 2397 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:26,899 INFO L93 Difference]: Finished difference Result 3237 states and 3579 transitions. [2021-12-07 00:08:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 00:08:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-07 00:08:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:26,909 INFO L225 Difference]: With dead ends: 3237 [2021-12-07 00:08:26,910 INFO L226 Difference]: Without dead ends: 2590 [2021-12-07 00:08:26,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=4632, Unknown=1, NotChecked=138, Total=5112 [2021-12-07 00:08:26,910 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 358 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:26,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 3593 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2052 Invalid, 0 Unknown, 275 Unchecked, 0.5s Time] [2021-12-07 00:08:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-12-07 00:08:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2272. [2021-12-07 00:08:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2270 states have (on average 1.1123348017621146) internal successors, (2525), 2271 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2525 transitions. [2021-12-07 00:08:26,948 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2525 transitions. Word has length 93 [2021-12-07 00:08:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:26,948 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2525 transitions. [2021-12-07 00:08:26,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2525 transitions. [2021-12-07 00:08:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 00:08:26,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:26,949 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:26,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 00:08:27,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:27,150 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -685357072, now seen corresponding path program 9 times [2021-12-07 00:08:27,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224455796] [2021-12-07 00:08:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:27,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 15 proven. 225 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:08:27,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224455796] [2021-12-07 00:08:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224455796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195508756] [2021-12-07 00:08:27,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:08:27,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:27,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:27,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 00:08:27,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:08:27,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 00:08:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:27,477 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:08:27,477 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 00:08:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:08:27,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:08:28,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195508756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:28,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:28,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2021-12-07 00:08:28,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286961081] [2021-12-07 00:08:28,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:28,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-07 00:08:28,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-07 00:08:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2237, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 00:08:28,392 INFO L87 Difference]: Start difference. First operand 2272 states and 2525 transitions. Second operand has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:29,331 INFO L93 Difference]: Finished difference Result 4734 states and 5196 transitions. [2021-12-07 00:08:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-07 00:08:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-07 00:08:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:29,346 INFO L225 Difference]: With dead ends: 4734 [2021-12-07 00:08:29,346 INFO L226 Difference]: Without dead ends: 4734 [2021-12-07 00:08:29,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=4467, Unknown=0, NotChecked=0, Total=5550 [2021-12-07 00:08:29,347 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 472 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:29,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 813 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:08:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-12-07 00:08:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 2362. [2021-12-07 00:08:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2360 states have (on average 1.1152542372881356) internal successors, (2632), 2361 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 2632 transitions. [2021-12-07 00:08:29,372 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 2632 transitions. Word has length 93 [2021-12-07 00:08:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:29,372 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 2632 transitions. [2021-12-07 00:08:29,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 2632 transitions. [2021-12-07 00:08:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:08:29,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:29,374 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:29,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 00:08:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:29,575 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 73409007, now seen corresponding path program 13 times [2021-12-07 00:08:29,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432588146] [2021-12-07 00:08:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:29,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:29,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432588146] [2021-12-07 00:08:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432588146] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775041116] [2021-12-07 00:08:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:08:29,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:29,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:29,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 00:08:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-07 00:08:29,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:29,896 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:08:29,896 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 00:08:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:31,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775041116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:32,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2021-12-07 00:08:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581884205] [2021-12-07 00:08:32,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-07 00:08:32,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:32,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-07 00:08:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2021-12-07 00:08:32,326 INFO L87 Difference]: Start difference. First operand 2362 states and 2632 transitions. Second operand has 61 states, 60 states have (on average 4.75) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:34,958 INFO L93 Difference]: Finished difference Result 2926 states and 3223 transitions. [2021-12-07 00:08:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 00:08:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.75) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 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 97 [2021-12-07 00:08:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:34,965 INFO L225 Difference]: With dead ends: 2926 [2021-12-07 00:08:34,965 INFO L226 Difference]: Without dead ends: 2926 [2021-12-07 00:08:34,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 174 SyntacticMatches, 7 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2245, Invalid=14267, Unknown=0, NotChecked=0, Total=16512 [2021-12-07 00:08:34,967 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 451 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1140 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:34,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 3576 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1137 Invalid, 0 Unknown, 1140 Unchecked, 0.3s Time] [2021-12-07 00:08:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-12-07 00:08:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2487. [2021-12-07 00:08:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2485 states have (on average 1.1162977867203219) internal successors, (2774), 2486 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2774 transitions. [2021-12-07 00:08:34,989 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2774 transitions. Word has length 97 [2021-12-07 00:08:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2774 transitions. [2021-12-07 00:08:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.75) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2774 transitions. [2021-12-07 00:08:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-07 00:08:34,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:34,991 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:35,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-07 00:08:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 00:08:35,192 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1932732552, now seen corresponding path program 10 times [2021-12-07 00:08:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:35,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498055237] [2021-12-07 00:08:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:35,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 73 proven. 270 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:08:35,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498055237] [2021-12-07 00:08:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498055237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694256801] [2021-12-07 00:08:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:08:35,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:35,504 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:35,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 00:08:35,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:08:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-07 00:08:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:35,606 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:08:35,606 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 00:08:35,875 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 00:08:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:08:36,457 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 00:08:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 73 proven. 219 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:08:36,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:37,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-07 00:08:37,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-07 00:08:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 72 proven. 220 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:08:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694256801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:37,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:37,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 22] total 64 [2021-12-07 00:08:37,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76083722] [2021-12-07 00:08:37,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:37,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-07 00:08:37,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-07 00:08:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3739, Unknown=0, NotChecked=0, Total=4032 [2021-12-07 00:08:37,510 INFO L87 Difference]: Start difference. First operand 2487 states and 2774 transitions. Second operand has 64 states, 64 states have (on average 3.640625) internal successors, (233), 64 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:40,304 INFO L93 Difference]: Finished difference Result 8142 states and 8980 transitions. [2021-12-07 00:08:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-07 00:08:40,305 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.640625) internal successors, (233), 64 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-07 00:08:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:40,313 INFO L225 Difference]: With dead ends: 8142 [2021-12-07 00:08:40,313 INFO L226 Difference]: Without dead ends: 7418 [2021-12-07 00:08:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 171 SyntacticMatches, 9 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6619 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1774, Invalid=17966, Unknown=0, NotChecked=0, Total=19740 [2021-12-07 00:08:40,315 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 305 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:40,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1965 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 722 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2021-12-07 00:08:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2021-12-07 00:08:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 3435. [2021-12-07 00:08:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3433 states have (on average 1.1214681036993883) internal successors, (3850), 3434 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 3850 transitions. [2021-12-07 00:08:40,357 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 3850 transitions. Word has length 98 [2021-12-07 00:08:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:40,357 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 3850 transitions. [2021-12-07 00:08:40,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.640625) internal successors, (233), 64 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 3850 transitions. [2021-12-07 00:08:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 00:08:40,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:40,359 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:40,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-07 00:08:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-07 00:08:40,560 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1376527291, now seen corresponding path program 14 times [2021-12-07 00:08:40,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760677812] [2021-12-07 00:08:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:40,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:41,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760677812] [2021-12-07 00:08:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760677812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942075383] [2021-12-07 00:08:41,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:08:41,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:41,150 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:41,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 00:08:41,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:08:41,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-07 00:08:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:08:41,529 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 00:08:41,574 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 00:08:41,737 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 00:08:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:41,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1160 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1160) |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 00:08:41,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:41,866 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 00:08:41,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:08:41,870 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 00:08:41,872 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 00:08:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:42,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942075383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:42,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:42,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 49 [2021-12-07 00:08:42,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923578914] [2021-12-07 00:08:42,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:42,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 00:08:42,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 00:08:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2144, Unknown=1, NotChecked=92, Total=2352 [2021-12-07 00:08:42,099 INFO L87 Difference]: Start difference. First operand 3435 states and 3850 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 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 00:08:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:44,423 INFO L93 Difference]: Finished difference Result 5320 states and 5923 transitions. [2021-12-07 00:08:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-07 00:08:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 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 105 [2021-12-07 00:08:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:44,427 INFO L225 Difference]: With dead ends: 5320 [2021-12-07 00:08:44,428 INFO L226 Difference]: Without dead ends: 4120 [2021-12-07 00:08:44,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=377, Invalid=7997, Unknown=2, NotChecked=180, Total=8556 [2021-12-07 00:08:44,428 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 441 mSDsluCounter, 6638 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 6832 SdHoareTripleChecker+Invalid, 4624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:44,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 6832 Invalid, 4624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4247 Invalid, 0 Unknown, 342 Unchecked, 1.1s Time] [2021-12-07 00:08:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-12-07 00:08:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3540. [2021-12-07 00:08:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3538 states have (on average 1.119559072922555) internal successors, (3961), 3539 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 3961 transitions. [2021-12-07 00:08:44,463 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 3961 transitions. Word has length 105 [2021-12-07 00:08:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:44,464 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 3961 transitions. [2021-12-07 00:08:44,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 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 00:08:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 3961 transitions. [2021-12-07 00:08:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-07 00:08:44,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:44,465 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:44,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 00:08:44,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-07 00:08:44,666 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1143618907, now seen corresponding path program 11 times [2021-12-07 00:08:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047751819] [2021-12-07 00:08:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:44,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 317 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 00:08:44,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047751819] [2021-12-07 00:08:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047751819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664388153] [2021-12-07 00:08:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:08:44,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:44,891 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:44,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 00:08:44,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-07 00:08:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-07 00:08:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:45,009 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:08:45,009 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 00:08:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 300 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 00:08:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 66 proven. 279 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 00:08:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664388153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:46,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:46,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 51 [2021-12-07 00:08:46,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999815570] [2021-12-07 00:08:46,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:46,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:08:46,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:08:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 00:08:46,021 INFO L87 Difference]: Start difference. First operand 3540 states and 3961 transitions. Second operand has 52 states, 51 states have (on average 4.392156862745098) internal successors, (224), 52 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:47,012 INFO L93 Difference]: Finished difference Result 7455 states and 8233 transitions. [2021-12-07 00:08:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:08:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.392156862745098) internal successors, (224), 52 states have internal predecessors, (224), 0 states have call successors, (0), 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 00:08:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:47,019 INFO L225 Difference]: With dead ends: 7455 [2021-12-07 00:08:47,020 INFO L226 Difference]: Without dead ends: 7455 [2021-12-07 00:08:47,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1248, Invalid=5072, Unknown=0, NotChecked=0, Total=6320 [2021-12-07 00:08:47,020 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 467 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:47,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 1202 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:08:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2021-12-07 00:08:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 3640. [2021-12-07 00:08:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3638 states have (on average 1.1214953271028036) internal successors, (4080), 3639 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4080 transitions. [2021-12-07 00:08:47,062 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4080 transitions. Word has length 107 [2021-12-07 00:08:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:47,063 INFO L470 AbstractCegarLoop]: Abstraction has 3640 states and 4080 transitions. [2021-12-07 00:08:47,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.392156862745098) internal successors, (224), 52 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4080 transitions. [2021-12-07 00:08:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 00:08:47,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:47,064 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:47,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 00:08:47,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-07 00:08:47,265 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1659628482, now seen corresponding path program 15 times [2021-12-07 00:08:47,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:47,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096156305] [2021-12-07 00:08:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:47,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:47,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096156305] [2021-12-07 00:08:47,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096156305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63748719] [2021-12-07 00:08:47,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:08:47,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:47,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:47,512 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:47,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 00:08:47,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-07 00:08:47,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-07 00:08:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:48,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:48,439 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 00:08:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:08:48,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63748719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:48,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:48,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2021-12-07 00:08:48,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627810934] [2021-12-07 00:08:48,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 00:08:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 00:08:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2704, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 00:08:48,660 INFO L87 Difference]: Start difference. First operand 3640 states and 4080 transitions. Second operand has 56 states, 55 states have (on average 5.2) internal successors, (286), 56 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:49,709 INFO L93 Difference]: Finished difference Result 4494 states and 4995 transitions. [2021-12-07 00:08:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:08:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 5.2) internal successors, (286), 56 states have internal predecessors, (286), 0 states have call successors, (0), 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 109 [2021-12-07 00:08:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:49,715 INFO L225 Difference]: With dead ends: 4494 [2021-12-07 00:08:49,715 INFO L226 Difference]: Without dead ends: 4494 [2021-12-07 00:08:49,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=5675, Unknown=0, NotChecked=0, Total=6972 [2021-12-07 00:08:49,716 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 734 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:49,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1870 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:08:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2021-12-07 00:08:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 3831. [2021-12-07 00:08:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3829 states have (on average 1.1224862888482632) internal successors, (4298), 3830 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 4298 transitions. [2021-12-07 00:08:49,761 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 4298 transitions. Word has length 109 [2021-12-07 00:08:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 3831 states and 4298 transitions. [2021-12-07 00:08:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 5.2) internal successors, (286), 56 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 4298 transitions. [2021-12-07 00:08:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:08:49,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:49,764 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:49,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 00:08:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-07 00:08:49,965 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:08:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:08:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2046221821, now seen corresponding path program 12 times [2021-12-07 00:08:49,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:08:49,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47099740] [2021-12-07 00:08:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:08:49,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:08:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:08:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 87 proven. 396 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:08:50,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:08:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47099740] [2021-12-07 00:08:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47099740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:08:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991478911] [2021-12-07 00:08:50,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:08:50,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:08:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:08:50,314 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:08:50,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 00:08:50,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 00:08:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:08:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 175 conjunts are in the unsatisfiable core [2021-12-07 00:08:50,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:08:50,479 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 00:08:50,741 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 00:08:50,775 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 00:08:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2021-12-07 00:08:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 84 proven. 399 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:08:52,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:08:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 87 proven. 330 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:08:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991478911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:08:52,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:08:52,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35, 21] total 73 [2021-12-07 00:08:52,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68176137] [2021-12-07 00:08:52,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:08:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-07 00:08:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:08:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-07 00:08:52,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5001, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 00:08:52,917 INFO L87 Difference]: Start difference. First operand 3831 states and 4298 transitions. Second operand has 73 states, 73 states have (on average 3.589041095890411) internal successors, (262), 73 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:08:59,854 INFO L93 Difference]: Finished difference Result 10296 states and 11329 transitions. [2021-12-07 00:08:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-12-07 00:08:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.589041095890411) internal successors, (262), 73 states have internal predecessors, (262), 0 states have call successors, (0), 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 112 [2021-12-07 00:08:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:08:59,862 INFO L225 Difference]: With dead ends: 10296 [2021-12-07 00:08:59,863 INFO L226 Difference]: Without dead ends: 10014 [2021-12-07 00:08:59,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 228 SyntacticMatches, 7 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26819 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3522, Invalid=70190, Unknown=0, NotChecked=0, Total=73712 [2021-12-07 00:08:59,866 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 834 mSDsluCounter, 8849 mSDsCounter, 0 mSdLazyCounter, 6789 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 9113 SdHoareTripleChecker+Invalid, 9801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 6789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2844 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:08:59,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 9113 Invalid, 9801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 6789 Invalid, 0 Unknown, 2844 Unchecked, 1.7s Time] [2021-12-07 00:08:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10014 states. [2021-12-07 00:08:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10014 to 3871. [2021-12-07 00:08:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3869 states have (on average 1.1201860945980873) internal successors, (4334), 3870 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 4334 transitions. [2021-12-07 00:08:59,920 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 4334 transitions. Word has length 112 [2021-12-07 00:08:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:08:59,920 INFO L470 AbstractCegarLoop]: Abstraction has 3871 states and 4334 transitions. [2021-12-07 00:08:59,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.589041095890411) internal successors, (262), 73 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:08:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 4334 transitions. [2021-12-07 00:08:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 00:08:59,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:08:59,922 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:08:59,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 00:09:00,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-07 00:09:00,123 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -175191210, now seen corresponding path program 2 times [2021-12-07 00:09:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430372345] [2021-12-07 00:09:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:00,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 12 proven. 391 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 00:09:00,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430372345] [2021-12-07 00:09:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430372345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217321399] [2021-12-07 00:09:00,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:09:00,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:00,388 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:00,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 00:09:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:09:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:09:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 00:09:00,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:00,499 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 00:09:00,730 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 00:09:00,765 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 00:09:02,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:09:02,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:09:02,025 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 00:09:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 12 proven. 391 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 00:09:02,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:02,215 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_261| Int) (v_ArrVal_1356 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_261|)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_261|) (< |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_261| 0))) is different from false [2021-12-07 00:09:02,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:09:02,221 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 00:09:02,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:09:02,225 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 00:09:02,228 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 00:09:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 12 proven. 391 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 00:09:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217321399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:02,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 52 [2021-12-07 00:09:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030173574] [2021-12-07 00:09:02,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:09:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:09:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2395, Unknown=1, NotChecked=98, Total=2652 [2021-12-07 00:09:02,741 INFO L87 Difference]: Start difference. First operand 3871 states and 4334 transitions. Second operand has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:09:03,587 INFO L93 Difference]: Finished difference Result 4031 states and 4433 transitions. [2021-12-07 00:09:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:09:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-07 00:09:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:09:03,589 INFO L225 Difference]: With dead ends: 4031 [2021-12-07 00:09:03,589 INFO L226 Difference]: Without dead ends: 3186 [2021-12-07 00:09:03,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=4539, Unknown=1, NotChecked=136, Total=4970 [2021-12-07 00:09:03,590 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 212 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:09:03,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 3408 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1189 Invalid, 0 Unknown, 701 Unchecked, 0.3s Time] [2021-12-07 00:09:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-12-07 00:09:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2577. [2021-12-07 00:09:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2575 states have (on average 1.1149514563106797) internal successors, (2871), 2576 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 2871 transitions. [2021-12-07 00:09:03,607 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 2871 transitions. Word has length 115 [2021-12-07 00:09:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:09:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 2871 transitions. [2021-12-07 00:09:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 2871 transitions. [2021-12-07 00:09:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 00:09:03,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:09:03,609 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:03,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-07 00:09:03,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-07 00:09:03,810 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash -104048886, now seen corresponding path program 16 times [2021-12-07 00:09:03,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895330958] [2021-12-07 00:09:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:03,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:04,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:04,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895330958] [2021-12-07 00:09:04,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895330958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:04,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654112081] [2021-12-07 00:09:04,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:09:04,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:04,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:04,163 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:04,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 00:09:04,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:09:04,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:09:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 00:09:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:04,288 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:09:04,288 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 00:09:04,296 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 00:09:04,696 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 00:09:04,742 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 00:09:13,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:09:13,066 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 18 treesize of output 7 [2021-12-07 00:09:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 242 proven. 176 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:13,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:14,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:09:14,041 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 00:09:14,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:09:14,046 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 00:09:14,049 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 00:09:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 250 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:15,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654112081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:15,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:15,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2021-12-07 00:09:15,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326330468] [2021-12-07 00:09:15,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:15,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-07 00:09:15,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-07 00:09:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=4708, Unknown=2, NotChecked=0, Total=5112 [2021-12-07 00:09:15,161 INFO L87 Difference]: Start difference. First operand 2577 states and 2871 transitions. Second operand has 72 states, 72 states have (on average 4.541666666666667) internal successors, (327), 72 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) [2021-12-07 00:09:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:09:48,619 INFO L93 Difference]: Finished difference Result 5169 states and 5728 transitions. [2021-12-07 00:09:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-07 00:09:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.541666666666667) internal successors, (327), 72 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) Word has length 117 [2021-12-07 00:09:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:09:48,621 INFO L225 Difference]: With dead ends: 5169 [2021-12-07 00:09:48,621 INFO L226 Difference]: Without dead ends: 3818 [2021-12-07 00:09:48,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2884 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1373, Invalid=14613, Unknown=16, NotChecked=0, Total=16002 [2021-12-07 00:09:48,622 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 516 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 3896 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:09:48,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 3896 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1408 Invalid, 0 Unknown, 439 Unchecked, 0.5s Time] [2021-12-07 00:09:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2021-12-07 00:09:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 2692. [2021-12-07 00:09:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2690 states have (on average 1.112267657992565) internal successors, (2992), 2691 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 2992 transitions. [2021-12-07 00:09:48,643 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 2992 transitions. Word has length 117 [2021-12-07 00:09:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:09:48,643 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 2992 transitions. [2021-12-07 00:09:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.541666666666667) internal successors, (327), 72 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) [2021-12-07 00:09:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 2992 transitions. [2021-12-07 00:09:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 00:09:48,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:09:48,645 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:48,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-07 00:09:48,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:48,846 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1537489229, now seen corresponding path program 13 times [2021-12-07 00:09:48,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:48,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701434173] [2021-12-07 00:09:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:48,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 28 proven. 416 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701434173] [2021-12-07 00:09:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701434173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91405937] [2021-12-07 00:09:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:09:49,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:49,110 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:49,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 00:09:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 00:09:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:49,340 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 00:09:49,666 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 00:09:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 28 proven. 416 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:49,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:49,801 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 13 [2021-12-07 00:09:49,802 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 26 treesize of output 22 [2021-12-07 00:09:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 28 proven. 416 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91405937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:49,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:49,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 42 [2021-12-07 00:09:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655079971] [2021-12-07 00:09:49,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-07 00:09:49,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-07 00:09:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-12-07 00:09:49,913 INFO L87 Difference]: Start difference. First operand 2692 states and 2992 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:09:51,230 INFO L93 Difference]: Finished difference Result 7370 states and 8123 transitions. [2021-12-07 00:09:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 00:09:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 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 00:09:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:09:51,234 INFO L225 Difference]: With dead ends: 7370 [2021-12-07 00:09:51,234 INFO L226 Difference]: Without dead ends: 6717 [2021-12-07 00:09:51,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=5539, Unknown=0, NotChecked=0, Total=6162 [2021-12-07 00:09:51,235 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 443 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:09:51,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 2995 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2119 Invalid, 0 Unknown, 305 Unchecked, 0.6s Time] [2021-12-07 00:09:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2021-12-07 00:09:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 3075. [2021-12-07 00:09:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3073 states have (on average 1.116498535632932) internal successors, (3431), 3074 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3431 transitions. [2021-12-07 00:09:51,267 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3431 transitions. Word has length 117 [2021-12-07 00:09:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:09:51,267 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 3431 transitions. [2021-12-07 00:09:51,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3431 transitions. [2021-12-07 00:09:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-07 00:09:51,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:09:51,269 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:51,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 00:09:51,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:51,469 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:51,470 INFO L85 PathProgramCache]: Analyzing trace with hash -713516275, now seen corresponding path program 17 times [2021-12-07 00:09:51,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:51,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154148936] [2021-12-07 00:09:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:51,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:51,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:51,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154148936] [2021-12-07 00:09:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154148936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993219563] [2021-12-07 00:09:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:09:51,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:51,766 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:51,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 00:09:51,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-07 00:09:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:09:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-07 00:09:51,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:52,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:52,745 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 21 treesize of output 17 [2021-12-07 00:09:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:09:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993219563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:53,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:53,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 58 [2021-12-07 00:09:53,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752082727] [2021-12-07 00:09:53,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-07 00:09:53,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-07 00:09:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-12-07 00:09:53,064 INFO L87 Difference]: Start difference. First operand 3075 states and 3431 transitions. Second operand has 59 states, 58 states have (on average 4.879310344827586) internal successors, (283), 59 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 00:09:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:09:54,457 INFO L93 Difference]: Finished difference Result 4449 states and 4892 transitions. [2021-12-07 00:09:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-07 00:09:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.879310344827586) internal successors, (283), 59 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) Word has length 121 [2021-12-07 00:09:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:09:54,460 INFO L225 Difference]: With dead ends: 4449 [2021-12-07 00:09:54,460 INFO L226 Difference]: Without dead ends: 4449 [2021-12-07 00:09:54,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1672, Invalid=6338, Unknown=0, NotChecked=0, Total=8010 [2021-12-07 00:09:54,461 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 845 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 3532 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:09:54,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 3532 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:09:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2021-12-07 00:09:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 3304. [2021-12-07 00:09:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3304 states, 3302 states have (on average 1.118413082980012) internal successors, (3693), 3303 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3304 states to 3304 states and 3693 transitions. [2021-12-07 00:09:54,497 INFO L78 Accepts]: Start accepts. Automaton has 3304 states and 3693 transitions. Word has length 121 [2021-12-07 00:09:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:09:54,497 INFO L470 AbstractCegarLoop]: Abstraction has 3304 states and 3693 transitions. [2021-12-07 00:09:54,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.879310344827586) internal successors, (283), 59 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 00:09:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3304 states and 3693 transitions. [2021-12-07 00:09:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-07 00:09:54,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:09:54,499 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:54,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 00:09:54,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-07 00:09:54,699 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1202626826, now seen corresponding path program 14 times [2021-12-07 00:09:54,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050160263] [2021-12-07 00:09:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:54,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 45 proven. 424 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:54,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:54,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050160263] [2021-12-07 00:09:54,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050160263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:54,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407714833] [2021-12-07 00:09:54,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:09:54,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:54,968 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:54,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 00:09:55,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:09:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:09:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 00:09:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 66 proven. 403 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:09:55,832 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 00:09:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 66 proven. 403 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 00:09:55,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407714833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:09:55,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:09:55,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2021-12-07 00:09:55,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303771241] [2021-12-07 00:09:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:09:55,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:09:55,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:09:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:09:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:09:55,884 INFO L87 Difference]: Start difference. First operand 3304 states and 3693 transitions. Second operand has 46 states, 45 states have (on average 4.222222222222222) internal successors, (190), 46 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:09:57,396 INFO L93 Difference]: Finished difference Result 7638 states and 8481 transitions. [2021-12-07 00:09:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 00:09:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.222222222222222) internal successors, (190), 46 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-07 00:09:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:09:57,400 INFO L225 Difference]: With dead ends: 7638 [2021-12-07 00:09:57,400 INFO L226 Difference]: Without dead ends: 7638 [2021-12-07 00:09:57,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-12-07 00:09:57,401 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 628 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:09:57,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 1456 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:09:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2021-12-07 00:09:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 3389. [2021-12-07 00:09:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3387 states have (on average 1.1201653380572778) internal successors, (3794), 3388 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 3794 transitions. [2021-12-07 00:09:57,434 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 3794 transitions. Word has length 121 [2021-12-07 00:09:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:09:57,434 INFO L470 AbstractCegarLoop]: Abstraction has 3389 states and 3794 transitions. [2021-12-07 00:09:57,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.222222222222222) internal successors, (190), 46 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:09:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 3794 transitions. [2021-12-07 00:09:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-07 00:09:57,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:09:57,436 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:09:57,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 00:09:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-07 00:09:57,637 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:09:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:09:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash -560233150, now seen corresponding path program 15 times [2021-12-07 00:09:57,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:09:57,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010585862] [2021-12-07 00:09:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:09:57,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:09:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:09:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 546 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:09:58,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:09:58,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010585862] [2021-12-07 00:09:58,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010585862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:09:58,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169783851] [2021-12-07 00:09:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:09:58,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:09:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:09:58,034 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:09:58,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 00:09:58,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-07 00:09:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:09:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-07 00:09:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:09:58,229 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 00:09:58,583 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 00:09:58,626 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 00:10:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2021-12-07 00:10:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 98 proven. 549 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:10:00,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:10:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 455 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-07 00:10:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169783851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:10:01,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:10:01,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 23] total 80 [2021-12-07 00:10:01,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478381290] [2021-12-07 00:10:01,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:10:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-07 00:10:01,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-07 00:10:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=6039, Unknown=0, NotChecked=0, Total=6320 [2021-12-07 00:10:01,112 INFO L87 Difference]: Start difference. First operand 3389 states and 3794 transitions. Second operand has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 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 00:10:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:10:10,528 INFO L93 Difference]: Finished difference Result 10086 states and 11148 transitions. [2021-12-07 00:10:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-12-07 00:10:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 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) Word has length 126 [2021-12-07 00:10:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:10:10,534 INFO L225 Difference]: With dead ends: 10086 [2021-12-07 00:10:10,534 INFO L226 Difference]: Without dead ends: 9723 [2021-12-07 00:10:10,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 276 SyntacticMatches, 23 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41023 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4327, Invalid=97115, Unknown=0, NotChecked=0, Total=101442 [2021-12-07 00:10:10,538 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 1066 mSDsluCounter, 14001 mSDsCounter, 0 mSdLazyCounter, 6653 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 14361 SdHoareTripleChecker+Invalid, 9430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 6653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2591 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:10:10,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 14361 Invalid, 9430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 6653 Invalid, 0 Unknown, 2591 Unchecked, 1.9s Time] [2021-12-07 00:10:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2021-12-07 00:10:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 3434. [2021-12-07 00:10:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3432 states have (on average 1.116841491841492) internal successors, (3833), 3433 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:10:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 3833 transitions. [2021-12-07 00:10:10,582 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 3833 transitions. Word has length 126 [2021-12-07 00:10:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:10:10,583 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 3833 transitions. [2021-12-07 00:10:10,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 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 00:10:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 3833 transitions. [2021-12-07 00:10:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 00:10:10,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:10:10,585 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:10:10,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-07 00:10:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-07 00:10:10,786 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:10:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:10:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1134599897, now seen corresponding path program 18 times [2021-12-07 00:10:10,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:10:10,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715745454] [2021-12-07 00:10:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:10:10,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:10:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:10:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 29 proven. 504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:11,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:10:11,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715745454] [2021-12-07 00:10:11,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715745454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:10:11,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479673983] [2021-12-07 00:10:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:10:11,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:10:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:11,403 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:10:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 00:10:11,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 00:10:11,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:10:11,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-07 00:10:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:10:11,649 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:10:11,649 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 00:10:11,657 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 00:10:12,184 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 00:10:12,239 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 00:10:38,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:10:38,129 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 18 treesize of output 7 [2021-12-07 00:10:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 285 proven. 216 refuted. 32 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:38,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:10:39,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:10:39,404 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 00:10:39,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:10:39,411 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 00:10:39,414 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 00:10:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 317 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:10:40,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479673983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:10:40,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:10:40,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 29, 29] total 88 [2021-12-07 00:10:40,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054590458] [2021-12-07 00:10:40,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:10:40,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-07 00:10:40,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:10:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-07 00:10:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=7157, Unknown=7, NotChecked=0, Total=7656 [2021-12-07 00:10:40,851 INFO L87 Difference]: Start difference. First operand 3434 states and 3833 transitions. Second operand has 88 states, 88 states have (on average 4.193181818181818) internal successors, (369), 88 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:14,343 INFO L93 Difference]: Finished difference Result 7137 states and 7909 transitions. [2021-12-07 00:11:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-07 00:11:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.193181818181818) internal successors, (369), 88 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-07 00:11:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:14,346 INFO L225 Difference]: With dead ends: 7137 [2021-12-07 00:11:14,346 INFO L226 Difference]: Without dead ends: 5189 [2021-12-07 00:11:14,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 59.9s TimeCoverageRelationStatistics Valid=1754, Invalid=21797, Unknown=11, NotChecked=0, Total=23562 [2021-12-07 00:11:14,347 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 551 mSDsluCounter, 5157 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 5266 SdHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1423 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:14,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 5266 Invalid, 3730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2281 Invalid, 0 Unknown, 1423 Unchecked, 0.7s Time] [2021-12-07 00:11:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2021-12-07 00:11:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 3563. [2021-12-07 00:11:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3561 states have (on average 1.1142937377141253) internal successors, (3968), 3562 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3968 transitions. [2021-12-07 00:11:14,380 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 3968 transitions. Word has length 129 [2021-12-07 00:11:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:14,380 INFO L470 AbstractCegarLoop]: Abstraction has 3563 states and 3968 transitions. [2021-12-07 00:11:14,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.193181818181818) internal successors, (369), 88 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 3968 transitions. [2021-12-07 00:11:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-07 00:11:14,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:14,382 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:14,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-07 00:11:14,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-07 00:11:14,584 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438754, now seen corresponding path program 16 times [2021-12-07 00:11:14,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16056435] [2021-12-07 00:11:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:14,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 32 proven. 551 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-07 00:11:14,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:14,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16056435] [2021-12-07 00:11:14,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16056435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:14,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814325259] [2021-12-07 00:11:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:11:14,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:14,893 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 00:11:14,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:11:14,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:11:14,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-07 00:11:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:15,007 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:11:15,007 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 00:11:15,104 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 16 treesize of output 12 [2021-12-07 00:11:16,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:11:16,557 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 00:11:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 109 proven. 526 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 00:11:16,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:19,007 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 13 [2021-12-07 00:11:19,009 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 26 treesize of output 22 [2021-12-07 00:11:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 129 proven. 506 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-07 00:11:19,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814325259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:19,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:19,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 83 [2021-12-07 00:11:19,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398024750] [2021-12-07 00:11:19,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:19,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-07 00:11:19,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-07 00:11:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=6378, Unknown=0, NotChecked=0, Total=6806 [2021-12-07 00:11:19,388 INFO L87 Difference]: Start difference. First operand 3563 states and 3968 transitions. Second operand has 83 states, 83 states have (on average 3.6265060240963853) internal successors, (301), 83 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:27,100 INFO L93 Difference]: Finished difference Result 8632 states and 9625 transitions. [2021-12-07 00:11:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-07 00:11:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.6265060240963853) internal successors, (301), 83 states have internal predecessors, (301), 0 states have call successors, (0), 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 131 [2021-12-07 00:11:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:27,105 INFO L225 Difference]: With dead ends: 8632 [2021-12-07 00:11:27,105 INFO L226 Difference]: Without dead ends: 7831 [2021-12-07 00:11:27,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 227 SyntacticMatches, 39 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11321 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2981, Invalid=29961, Unknown=0, NotChecked=0, Total=32942 [2021-12-07 00:11:27,106 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 420 mSDsluCounter, 3365 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:27,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 3456 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1799 Invalid, 0 Unknown, 622 Unchecked, 0.6s Time] [2021-12-07 00:11:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7831 states. [2021-12-07 00:11:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7831 to 4128. [2021-12-07 00:11:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4126 states have (on average 1.120213281628696) internal successors, (4622), 4127 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 4622 transitions. [2021-12-07 00:11:27,145 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 4622 transitions. Word has length 131 [2021-12-07 00:11:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:27,145 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 4622 transitions. [2021-12-07 00:11:27,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.6265060240963853) internal successors, (301), 83 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 4622 transitions. [2021-12-07 00:11:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:11:27,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:27,147 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:27,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-07 00:11:27,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:27,348 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1768950180, now seen corresponding path program 19 times [2021-12-07 00:11:27,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:27,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823425173] [2021-12-07 00:11:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:27,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:27,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823425173] [2021-12-07 00:11:27,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823425173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252938510] [2021-12-07 00:11:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:11:27,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:27,698 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:27,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 00:11:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-07 00:11:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:28,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:28,767 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 00:11:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:28,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252938510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:28,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:28,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 54 [2021-12-07 00:11:28,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442906672] [2021-12-07 00:11:28,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:28,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-07 00:11:28,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-07 00:11:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2021-12-07 00:11:28,823 INFO L87 Difference]: Start difference. First operand 4128 states and 4622 transitions. Second operand has 55 states, 54 states have (on average 4.944444444444445) internal successors, (267), 55 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:30,301 INFO L93 Difference]: Finished difference Result 6238 states and 6876 transitions. [2021-12-07 00:11:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:11:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.944444444444445) internal successors, (267), 55 states have internal predecessors, (267), 0 states have call successors, (0), 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 133 [2021-12-07 00:11:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:30,308 INFO L225 Difference]: With dead ends: 6238 [2021-12-07 00:11:30,308 INFO L226 Difference]: Without dead ends: 6238 [2021-12-07 00:11:30,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1479, Invalid=6353, Unknown=0, NotChecked=0, Total=7832 [2021-12-07 00:11:30,309 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1009 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:30,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 3062 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:11:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-12-07 00:11:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 4410. [2021-12-07 00:11:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 4408 states have (on average 1.1220508166969148) internal successors, (4946), 4409 states have internal predecessors, (4946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 4946 transitions. [2021-12-07 00:11:30,341 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 4946 transitions. Word has length 133 [2021-12-07 00:11:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:30,341 INFO L470 AbstractCegarLoop]: Abstraction has 4410 states and 4946 transitions. [2021-12-07 00:11:30,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.944444444444445) internal successors, (267), 55 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 4946 transitions. [2021-12-07 00:11:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 00:11:30,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:30,343 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:30,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-07 00:11:30,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:30,544 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1921261897, now seen corresponding path program 17 times [2021-12-07 00:11:30,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508800177] [2021-12-07 00:11:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:30,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 115 proven. 720 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:11:30,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508800177] [2021-12-07 00:11:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508800177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917481686] [2021-12-07 00:11:30,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:11:30,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:30,999 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:31,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 00:11:31,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-07 00:11:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:11:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 166 conjunts are in the unsatisfiable core [2021-12-07 00:11:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:31,301 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 6 treesize of output 5 [2021-12-07 00:11:31,768 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 00:11:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 115 proven. 719 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:11:31,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 115 proven. 600 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-07 00:11:32,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917481686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:32,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:32,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 25] total 68 [2021-12-07 00:11:32,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451543643] [2021-12-07 00:11:32,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:32,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-07 00:11:32,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-07 00:11:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4334, Unknown=0, NotChecked=0, Total=4556 [2021-12-07 00:11:32,296 INFO L87 Difference]: Start difference. First operand 4410 states and 4946 transitions. Second operand has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:42,560 INFO L93 Difference]: Finished difference Result 14743 states and 16406 transitions. [2021-12-07 00:11:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-12-07 00:11:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 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 140 [2021-12-07 00:11:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:42,568 INFO L225 Difference]: With dead ends: 14743 [2021-12-07 00:11:42,568 INFO L226 Difference]: Without dead ends: 14332 [2021-12-07 00:11:42,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25292 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=4024, Invalid=79786, Unknown=0, NotChecked=0, Total=83810 [2021-12-07 00:11:42,571 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 1579 mSDsluCounter, 12940 mSDsCounter, 0 mSdLazyCounter, 12689 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 13325 SdHoareTripleChecker+Invalid, 12904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 12689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 13325 Invalid, 12904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 12689 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-07 00:11:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14332 states. [2021-12-07 00:11:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14332 to 4460. [2021-12-07 00:11:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4458 states have (on average 1.1191117092866756) internal successors, (4989), 4459 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 4989 transitions. [2021-12-07 00:11:42,624 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 4989 transitions. Word has length 140 [2021-12-07 00:11:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:42,624 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 4989 transitions. [2021-12-07 00:11:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 4989 transitions. [2021-12-07 00:11:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-07 00:11:42,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:42,627 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-07 00:11:42,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-07 00:11:42,828 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 306920232, now seen corresponding path program 20 times [2021-12-07 00:11:42,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450088852] [2021-12-07 00:11:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:42,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:43,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450088852] [2021-12-07 00:11:43,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450088852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704279246] [2021-12-07 00:11:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:11:43,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:43,508 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:43,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 00:11:43,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:11:43,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:11:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-07 00:11:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:43,651 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 00:11:44,227 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 00:11:44,289 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 00:11:45,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:11:45,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:11:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-07 00:11:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:45,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:45,554 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1908 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1908) |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 00:11:45,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:11:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 00:11:45,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:11:45,561 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 00:11:45,563 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 00:11:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:46,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704279246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:46,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:46,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 80 [2021-12-07 00:11:46,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873325876] [2021-12-07 00:11:46,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:46,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-07 00:11:46,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-07 00:11:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5942, Unknown=1, NotChecked=154, Total=6320 [2021-12-07 00:11:46,231 INFO L87 Difference]: Start difference. First operand 4460 states and 4989 transitions. Second operand has 80 states, 80 states have (on average 4.05) internal successors, (324), 80 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:48,429 INFO L93 Difference]: Finished difference Result 9428 states and 10448 transitions. [2021-12-07 00:11:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-07 00:11:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.05) internal successors, (324), 80 states have internal predecessors, (324), 0 states have call successors, (0), 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 141 [2021-12-07 00:11:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:48,433 INFO L225 Difference]: With dead ends: 9428 [2021-12-07 00:11:48,433 INFO L226 Difference]: Without dead ends: 6878 [2021-12-07 00:11:48,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=380, Invalid=10129, Unknown=1, NotChecked=202, Total=10712 [2021-12-07 00:11:48,434 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 602 mSDsluCounter, 12410 mSDsCounter, 0 mSdLazyCounter, 4789 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 12670 SdHoareTripleChecker+Invalid, 6899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2087 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:48,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 12670 Invalid, 6899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4789 Invalid, 0 Unknown, 2087 Unchecked, 1.5s Time] [2021-12-07 00:11:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2021-12-07 00:11:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 4603. [2021-12-07 00:11:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4601 states have (on average 1.116713757878722) internal successors, (5138), 4602 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 5138 transitions. [2021-12-07 00:11:48,471 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 5138 transitions. Word has length 141 [2021-12-07 00:11:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:48,471 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 5138 transitions. [2021-12-07 00:11:48,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.05) internal successors, (324), 80 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 5138 transitions. [2021-12-07 00:11:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:11:48,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:48,473 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:48,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 00:11:48,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-07 00:11:48,675 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 184313387, now seen corresponding path program 21 times [2021-12-07 00:11:48,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:48,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156575170] [2021-12-07 00:11:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:48,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 153 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:49,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156575170] [2021-12-07 00:11:49,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156575170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674444658] [2021-12-07 00:11:49,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:11:49,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:49,064 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:49,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 00:11:49,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-07 00:11:49,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:11:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 00:11:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:50,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:50,687 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 5 [2021-12-07 00:11:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:50,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674444658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:50,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:50,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2021-12-07 00:11:50,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728931029] [2021-12-07 00:11:50,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:50,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-07 00:11:50,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-07 00:11:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=4286, Unknown=0, NotChecked=0, Total=4970 [2021-12-07 00:11:50,753 INFO L87 Difference]: Start difference. First operand 4603 states and 5138 transitions. Second operand has 71 states, 70 states have (on average 5.414285714285715) internal successors, (379), 71 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:52,531 INFO L93 Difference]: Finished difference Result 7165 states and 7839 transitions. [2021-12-07 00:11:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 00:11:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 5.414285714285715) internal successors, (379), 71 states have internal predecessors, (379), 0 states have call successors, (0), 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 145 [2021-12-07 00:11:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:52,535 INFO L225 Difference]: With dead ends: 7165 [2021-12-07 00:11:52,535 INFO L226 Difference]: Without dead ends: 7165 [2021-12-07 00:11:52,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2206, Invalid=9350, Unknown=0, NotChecked=0, Total=11556 [2021-12-07 00:11:52,536 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 828 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:52,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 3429 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:11:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2021-12-07 00:11:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 4885. [2021-12-07 00:11:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4885 states, 4883 states have (on average 1.1185746467335653) internal successors, (5462), 4884 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4885 states to 4885 states and 5462 transitions. [2021-12-07 00:11:52,577 INFO L78 Accepts]: Start accepts. Automaton has 4885 states and 5462 transitions. Word has length 145 [2021-12-07 00:11:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:52,577 INFO L470 AbstractCegarLoop]: Abstraction has 4885 states and 5462 transitions. [2021-12-07 00:11:52,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 5.414285714285715) internal successors, (379), 71 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4885 states and 5462 transitions. [2021-12-07 00:11:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:11:52,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:52,579 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:52,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-07 00:11:52,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:52,780 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1825303609, now seen corresponding path program 18 times [2021-12-07 00:11:52,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210579771] [2021-12-07 00:11:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:52,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 36 proven. 705 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:11:53,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:53,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210579771] [2021-12-07 00:11:53,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210579771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:53,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412808794] [2021-12-07 00:11:53,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:11:53,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:53,113 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:53,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 00:11:53,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-07 00:11:53,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:11:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-07 00:11:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:11:53,407 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:11:53,407 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 00:11:53,753 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 00:11:55,076 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 13 treesize of output 9 [2021-12-07 00:11:55,426 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 00:11:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 184 proven. 740 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:11:55,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:11:56,086 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 13 [2021-12-07 00:11:56,088 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 26 treesize of output 22 [2021-12-07 00:11:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 211 proven. 713 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:11:57,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412808794] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:11:57,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:11:57,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 86 [2021-12-07 00:11:57,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346511205] [2021-12-07 00:11:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:11:57,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-07 00:11:57,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-07 00:11:57,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=6795, Unknown=0, NotChecked=0, Total=7310 [2021-12-07 00:11:57,021 INFO L87 Difference]: Start difference. First operand 4885 states and 5462 transitions. Second operand has 86 states, 86 states have (on average 3.8372093023255816) internal successors, (330), 86 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:59,185 INFO L93 Difference]: Finished difference Result 11093 states and 12419 transitions. [2021-12-07 00:11:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-07 00:11:59,186 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.8372093023255816) internal successors, (330), 86 states have internal predecessors, (330), 0 states have call successors, (0), 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 145 [2021-12-07 00:11:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:59,192 INFO L225 Difference]: With dead ends: 11093 [2021-12-07 00:11:59,192 INFO L226 Difference]: Without dead ends: 10085 [2021-12-07 00:11:59,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1616, Invalid=15940, Unknown=0, NotChecked=0, Total=17556 [2021-12-07 00:11:59,193 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 352 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:59,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 1948 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2011 Invalid, 0 Unknown, 336 Unchecked, 0.6s Time] [2021-12-07 00:11:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10085 states. [2021-12-07 00:11:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10085 to 5510. [2021-12-07 00:11:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5510 states, 5508 states have (on average 1.1229121278140886) internal successors, (6185), 5509 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5510 states to 5510 states and 6185 transitions. [2021-12-07 00:11:59,245 INFO L78 Accepts]: Start accepts. Automaton has 5510 states and 6185 transitions. Word has length 145 [2021-12-07 00:11:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:59,245 INFO L470 AbstractCegarLoop]: Abstraction has 5510 states and 6185 transitions. [2021-12-07 00:11:59,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.8372093023255816) internal successors, (330), 86 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5510 states and 6185 transitions. [2021-12-07 00:11:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-07 00:11:59,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:59,248 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:59,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-07 00:11:59,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-07 00:11:59,449 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:11:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash -287944196, now seen corresponding path program 19 times [2021-12-07 00:11:59,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:59,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370496545] [2021-12-07 00:11:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:59,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 91 proven. 699 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-07 00:11:59,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370496545] [2021-12-07 00:11:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370496545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:11:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898986670] [2021-12-07 00:11:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:11:59,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:11:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:11:59,812 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:11:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 00:11:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 00:11:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 120 proven. 654 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:12:00,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:00,887 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 00:12:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 120 proven. 654 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:12:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898986670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:00,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:00,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 56 [2021-12-07 00:12:00,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464064072] [2021-12-07 00:12:00,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:00,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 00:12:00,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 00:12:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2875, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 00:12:00,945 INFO L87 Difference]: Start difference. First operand 5510 states and 6185 transitions. Second operand has 57 states, 56 states have (on average 4.071428571428571) internal successors, (228), 57 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:02,897 INFO L93 Difference]: Finished difference Result 15804 states and 17728 transitions. [2021-12-07 00:12:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 00:12:02,897 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.071428571428571) internal successors, (228), 57 states have internal predecessors, (228), 0 states have call successors, (0), 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 149 [2021-12-07 00:12:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:02,906 INFO L225 Difference]: With dead ends: 15804 [2021-12-07 00:12:02,907 INFO L226 Difference]: Without dead ends: 15804 [2021-12-07 00:12:02,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1566, Invalid=6806, Unknown=0, NotChecked=0, Total=8372 [2021-12-07 00:12:02,907 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 703 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:02,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 2308 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:12:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15804 states. [2021-12-07 00:12:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15804 to 5615. [2021-12-07 00:12:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5615 states, 5613 states have (on average 1.124176019953679) internal successors, (6310), 5614 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 6310 transitions. [2021-12-07 00:12:02,982 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 6310 transitions. Word has length 149 [2021-12-07 00:12:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:02,982 INFO L470 AbstractCegarLoop]: Abstraction has 5615 states and 6310 transitions. [2021-12-07 00:12:02,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.071428571428571) internal successors, (228), 57 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 6310 transitions. [2021-12-07 00:12:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-07 00:12:02,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:02,985 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:03,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:03,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-07 00:12:03,186 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -366056457, now seen corresponding path program 22 times [2021-12-07 00:12:03,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:03,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399821823] [2021-12-07 00:12:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:03,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 24 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:03,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:03,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399821823] [2021-12-07 00:12:03,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399821823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:03,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350308677] [2021-12-07 00:12:03,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:12:03,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:03,972 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:03,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-07 00:12:04,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:12:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-07 00:12:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:04,157 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 00:12:04,160 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 00:12:04,986 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 16 treesize of output 12 [2021-12-07 00:12:05,039 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 19 treesize of output 21 [2021-12-07 00:12:06,905 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 30 treesize of output 22 [2021-12-07 00:12:06,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:12:06,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:12:06,910 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 00:12:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 475 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:08,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:12:08,496 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 00:12:08,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:12:08,501 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 00:12:08,504 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 00:12:10,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:12:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 475 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350308677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:10,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:10,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 34, 33] total 96 [2021-12-07 00:12:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294827845] [2021-12-07 00:12:10,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:10,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-07 00:12:10,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-07 00:12:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=8472, Unknown=1, NotChecked=0, Total=9120 [2021-12-07 00:12:10,179 INFO L87 Difference]: Start difference. First operand 5615 states and 6310 transitions. Second operand has 96 states, 96 states have (on average 4.541666666666667) internal successors, (436), 96 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:17,736 INFO L93 Difference]: Finished difference Result 11276 states and 12690 transitions. [2021-12-07 00:12:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-07 00:12:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.541666666666667) internal successors, (436), 96 states have internal predecessors, (436), 0 states have call successors, (0), 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 153 [2021-12-07 00:12:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:17,749 INFO L225 Difference]: With dead ends: 11276 [2021-12-07 00:12:17,749 INFO L226 Difference]: Without dead ends: 11076 [2021-12-07 00:12:17,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 275 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7553 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2097, Invalid=34574, Unknown=1, NotChecked=0, Total=36672 [2021-12-07 00:12:17,750 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 554 mSDsluCounter, 7007 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 7147 SdHoareTripleChecker+Invalid, 3931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 809 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:17,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 7147 Invalid, 3931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3049 Invalid, 0 Unknown, 809 Unchecked, 1.1s Time] [2021-12-07 00:12:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-12-07 00:12:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9699. [2021-12-07 00:12:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9699 states, 9697 states have (on average 1.1257089821594308) internal successors, (10916), 9698 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 10916 transitions. [2021-12-07 00:12:17,816 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 10916 transitions. Word has length 153 [2021-12-07 00:12:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:17,816 INFO L470 AbstractCegarLoop]: Abstraction has 9699 states and 10916 transitions. [2021-12-07 00:12:17,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.541666666666667) internal successors, (436), 96 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 10916 transitions. [2021-12-07 00:12:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-07 00:12:17,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:17,820 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:17,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:18,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:18,021 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash -831289860, now seen corresponding path program 20 times [2021-12-07 00:12:18,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575013090] [2021-12-07 00:12:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:18,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 129 proven. 918 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:18,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575013090] [2021-12-07 00:12:18,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575013090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403969280] [2021-12-07 00:12:18,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:18,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:18,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:18,566 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-07 00:12:18,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-07 00:12:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:18,941 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 00:12:19,433 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 00:12:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 38 proven. 828 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:12:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:19,654 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 13 [2021-12-07 00:12:19,655 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 26 treesize of output 22 [2021-12-07 00:12:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 38 proven. 828 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:12:19,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403969280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:19,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:19,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 29, 29] total 62 [2021-12-07 00:12:19,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154210059] [2021-12-07 00:12:19,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:19,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-07 00:12:19,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-07 00:12:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3609, Unknown=0, NotChecked=0, Total=3782 [2021-12-07 00:12:19,822 INFO L87 Difference]: Start difference. First operand 9699 states and 10916 transitions. Second operand has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:24,173 INFO L93 Difference]: Finished difference Result 34944 states and 39110 transitions. [2021-12-07 00:12:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-07 00:12:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 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 154 [2021-12-07 00:12:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:24,207 INFO L225 Difference]: With dead ends: 34944 [2021-12-07 00:12:24,207 INFO L226 Difference]: Without dead ends: 32840 [2021-12-07 00:12:24,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 293 SyntacticMatches, 17 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 8714 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1180, Invalid=24580, Unknown=0, NotChecked=0, Total=25760 [2021-12-07 00:12:24,208 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 395 mSDsluCounter, 6766 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 6942 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:24,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 6942 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2786 Invalid, 0 Unknown, 355 Unchecked, 0.8s Time] [2021-12-07 00:12:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32840 states. [2021-12-07 00:12:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32840 to 11095. [2021-12-07 00:12:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11093 states have (on average 1.128910123501307) internal successors, (12523), 11094 states have internal predecessors, (12523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 12523 transitions. [2021-12-07 00:12:24,358 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 12523 transitions. Word has length 154 [2021-12-07 00:12:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:24,358 INFO L470 AbstractCegarLoop]: Abstraction has 11095 states and 12523 transitions. [2021-12-07 00:12:24,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 12523 transitions. [2021-12-07 00:12:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-07 00:12:24,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:24,362 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:24,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-07 00:12:24,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-07 00:12:24,563 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 788540026, now seen corresponding path program 23 times [2021-12-07 00:12:24,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611001442] [2021-12-07 00:12:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:24,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 190 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:24,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:24,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611001442] [2021-12-07 00:12:24,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611001442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:24,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565349301] [2021-12-07 00:12:24,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:12:24,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:24,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:24,986 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:24,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-07 00:12:25,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-07 00:12:25,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-07 00:12:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 231 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:25,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:26,475 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 21 treesize of output 17 [2021-12-07 00:12:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 231 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:26,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565349301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:26,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:26,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 73 [2021-12-07 00:12:26,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149868263] [2021-12-07 00:12:26,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:26,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-07 00:12:26,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-07 00:12:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=4710, Unknown=0, NotChecked=0, Total=5402 [2021-12-07 00:12:26,968 INFO L87 Difference]: Start difference. First operand 11095 states and 12523 transitions. Second operand has 74 states, 73 states have (on average 5.027397260273973) internal successors, (367), 74 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:28,924 INFO L93 Difference]: Finished difference Result 13993 states and 15611 transitions. [2021-12-07 00:12:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 00:12:28,924 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 5.027397260273973) internal successors, (367), 74 states have internal predecessors, (367), 0 states have call successors, (0), 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 157 [2021-12-07 00:12:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:28,933 INFO L225 Difference]: With dead ends: 13993 [2021-12-07 00:12:28,933 INFO L226 Difference]: Without dead ends: 13993 [2021-12-07 00:12:28,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2689, Invalid=10193, Unknown=0, NotChecked=0, Total=12882 [2021-12-07 00:12:28,934 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 1149 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3864 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 00:12:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13993 states. [2021-12-07 00:12:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13993 to 11483. [2021-12-07 00:12:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11483 states, 11481 states have (on average 1.129779635920216) internal successors, (12971), 11482 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11483 states to 11483 states and 12971 transitions. [2021-12-07 00:12:29,029 INFO L78 Accepts]: Start accepts. Automaton has 11483 states and 12971 transitions. Word has length 157 [2021-12-07 00:12:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 11483 states and 12971 transitions. [2021-12-07 00:12:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 5.027397260273973) internal successors, (367), 74 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 11483 states and 12971 transitions. [2021-12-07 00:12:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 00:12:29,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:29,034 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:29,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-07 00:12:29,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:29,235 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash -160940185, now seen corresponding path program 21 times [2021-12-07 00:12:29,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630909741] [2021-12-07 00:12:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:29,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 120 proven. 835 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 00:12:29,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630909741] [2021-12-07 00:12:29,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630909741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453078632] [2021-12-07 00:12:29,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:12:29,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:29,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:29,645 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-07 00:12:29,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 00:12:29,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-07 00:12:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:29,982 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:12:29,982 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 00:12:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 153 proven. 838 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-07 00:12:31,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 190 proven. 765 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 00:12:32,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453078632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:32,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:32,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 81 [2021-12-07 00:12:32,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289437963] [2021-12-07 00:12:32,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:32,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-07 00:12:32,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:32,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-07 00:12:32,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=5830, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 00:12:32,281 INFO L87 Difference]: Start difference. First operand 11483 states and 12971 transitions. Second operand has 82 states, 81 states have (on average 4.283950617283951) internal successors, (347), 82 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:35,056 INFO L93 Difference]: Finished difference Result 39588 states and 44321 transitions. [2021-12-07 00:12:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-07 00:12:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 4.283950617283951) internal successors, (347), 82 states have internal predecessors, (347), 0 states have call successors, (0), 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 163 [2021-12-07 00:12:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:35,086 INFO L225 Difference]: With dead ends: 39588 [2021-12-07 00:12:35,086 INFO L226 Difference]: Without dead ends: 39588 [2021-12-07 00:12:35,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3769 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3220, Invalid=12782, Unknown=0, NotChecked=0, Total=16002 [2021-12-07 00:12:35,087 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 873 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:35,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 1899 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 00:12:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39588 states. [2021-12-07 00:12:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39588 to 11648. [2021-12-07 00:12:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11646 states have (on average 1.1306886484629917) internal successors, (13168), 11647 states have internal predecessors, (13168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 13168 transitions. [2021-12-07 00:12:35,292 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 13168 transitions. Word has length 163 [2021-12-07 00:12:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:35,292 INFO L470 AbstractCegarLoop]: Abstraction has 11648 states and 13168 transitions. [2021-12-07 00:12:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 4.283950617283951) internal successors, (347), 82 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 13168 transitions. [2021-12-07 00:12:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-07 00:12:35,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:35,297 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:35,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-07 00:12:35,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-07 00:12:35,498 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:35,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2125696698, now seen corresponding path program 24 times [2021-12-07 00:12:35,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:35,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175537953] [2021-12-07 00:12:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:35,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:36,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175537953] [2021-12-07 00:12:36,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175537953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787853775] [2021-12-07 00:12:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:12:36,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:36,435 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-07 00:12:36,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-07 00:12:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 159 conjunts are in the unsatisfiable core [2021-12-07 00:12:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:36,834 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 00:12:37,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 00:12:37,488 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 00:12:37,807 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 00:12:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:38,055 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2415 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2415) |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 00:12:38,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:12:38,059 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 00:12:38,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:12:38,064 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 00:12:38,066 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 00:12:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 26 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787853775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:38,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:38,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 64 [2021-12-07 00:12:38,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122847939] [2021-12-07 00:12:38,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:38,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-07 00:12:38,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-07 00:12:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3763, Unknown=1, NotChecked=122, Total=4032 [2021-12-07 00:12:38,388 INFO L87 Difference]: Start difference. First operand 11648 states and 13168 transitions. Second operand has 64 states, 64 states have (on average 3.6875) internal successors, (236), 64 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:42,742 INFO L93 Difference]: Finished difference Result 19537 states and 21951 transitions. [2021-12-07 00:12:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-07 00:12:42,742 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.6875) internal successors, (236), 64 states have internal predecessors, (236), 0 states have call successors, (0), 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 165 [2021-12-07 00:12:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:42,751 INFO L225 Difference]: With dead ends: 19537 [2021-12-07 00:12:42,751 INFO L226 Difference]: Without dead ends: 15204 [2021-12-07 00:12:42,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=447, Invalid=13362, Unknown=1, NotChecked=232, Total=14042 [2021-12-07 00:12:42,752 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 603 mSDsluCounter, 16046 mSDsCounter, 0 mSdLazyCounter, 9426 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 16382 SdHoareTripleChecker+Invalid, 9957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 9426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:42,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 16382 Invalid, 9957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 9426 Invalid, 0 Unknown, 504 Unchecked, 2.6s Time] [2021-12-07 00:12:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15204 states. [2021-12-07 00:12:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15204 to 11874. [2021-12-07 00:12:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11874 states, 11872 states have (on average 1.1292958221024259) internal successors, (13407), 11873 states have internal predecessors, (13407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 13407 transitions. [2021-12-07 00:12:42,848 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 13407 transitions. Word has length 165 [2021-12-07 00:12:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:42,848 INFO L470 AbstractCegarLoop]: Abstraction has 11874 states and 13407 transitions. [2021-12-07 00:12:42,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.6875) internal successors, (236), 64 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 13407 transitions. [2021-12-07 00:12:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-07 00:12:42,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:42,853 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:42,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-07 00:12:43,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-07 00:12:43,054 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -56343695, now seen corresponding path program 22 times [2021-12-07 00:12:43,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:43,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986428789] [2021-12-07 00:12:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:43,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 143 proven. 1140 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:43,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986428789] [2021-12-07 00:12:43,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986428789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292718970] [2021-12-07 00:12:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:12:43,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:43,705 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:43,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-07 00:12:43,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:12:43,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 00:12:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:43,852 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:12:43,852 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 00:12:44,399 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 00:12:45,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:12:45,701 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 00:12:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 268 proven. 789 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 00:12:45,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-07 00:12:46,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-07 00:12:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 267 proven. 790 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-07 00:12:48,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292718970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:48,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:48,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 32, 32] total 99 [2021-12-07 00:12:48,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664783102] [2021-12-07 00:12:48,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:48,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-07 00:12:48,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-07 00:12:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=9049, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 00:12:48,035 INFO L87 Difference]: Start difference. First operand 11874 states and 13407 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:55,790 INFO L93 Difference]: Finished difference Result 40637 states and 45614 transitions. [2021-12-07 00:12:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-07 00:12:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-07 00:12:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:55,816 INFO L225 Difference]: With dead ends: 40637 [2021-12-07 00:12:55,816 INFO L226 Difference]: Without dead ends: 37826 [2021-12-07 00:12:55,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 302 SyntacticMatches, 23 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 19874 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3981, Invalid=48231, Unknown=0, NotChecked=0, Total=52212 [2021-12-07 00:12:55,818 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 640 mSDsluCounter, 6238 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:55,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 6362 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2853 Invalid, 0 Unknown, 720 Unchecked, 0.9s Time] [2021-12-07 00:12:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37826 states. [2021-12-07 00:12:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37826 to 13457. [2021-12-07 00:12:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13457 states, 13455 states have (on average 1.132292827945002) internal successors, (15235), 13456 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13457 states to 13457 states and 15235 transitions. [2021-12-07 00:12:56,018 INFO L78 Accepts]: Start accepts. Automaton has 13457 states and 15235 transitions. Word has length 168 [2021-12-07 00:12:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 13457 states and 15235 transitions. [2021-12-07 00:12:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13457 states and 15235 transitions. [2021-12-07 00:12:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-07 00:12:56,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:56,022 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:56,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-07 00:12:56,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-07 00:12:56,223 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:12:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1618838345, now seen corresponding path program 25 times [2021-12-07 00:12:56,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:56,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468335697] [2021-12-07 00:12:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:56,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 231 proven. 744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:56,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468335697] [2021-12-07 00:12:56,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468335697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828332498] [2021-12-07 00:12:56,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:12:56,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:56,691 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:56,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-07 00:12:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:56,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-07 00:12:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:57,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:58,161 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 00:12:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 276 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828332498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:58,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:58,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 66 [2021-12-07 00:12:58,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111611907] [2021-12-07 00:12:58,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:58,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 00:12:58,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 00:12:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3924, Unknown=0, NotChecked=0, Total=4422 [2021-12-07 00:12:58,242 INFO L87 Difference]: Start difference. First operand 13457 states and 15235 transitions. Second operand has 67 states, 66 states have (on average 5.136363636363637) internal successors, (339), 67 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:00,476 INFO L93 Difference]: Finished difference Result 17246 states and 19305 transitions. [2021-12-07 00:13:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-07 00:13:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.136363636363637) internal successors, (339), 67 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-07 00:13:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:00,486 INFO L225 Difference]: With dead ends: 17246 [2021-12-07 00:13:00,486 INFO L226 Difference]: Without dead ends: 17246 [2021-12-07 00:13:00,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 301 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2268, Invalid=9722, Unknown=0, NotChecked=0, Total=11990 [2021-12-07 00:13:00,487 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 1058 mSDsluCounter, 4382 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 4578 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:00,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 4578 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 00:13:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17246 states. [2021-12-07 00:13:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17246 to 13908. [2021-12-07 00:13:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13908 states, 13906 states have (on average 1.1331080109305336) internal successors, (15757), 13907 states have internal predecessors, (15757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13908 states to 13908 states and 15757 transitions. [2021-12-07 00:13:00,599 INFO L78 Accepts]: Start accepts. Automaton has 13908 states and 15757 transitions. Word has length 169 [2021-12-07 00:13:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:00,599 INFO L470 AbstractCegarLoop]: Abstraction has 13908 states and 15757 transitions. [2021-12-07 00:13:00,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.136363636363637) internal successors, (339), 67 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13908 states and 15757 transitions. [2021-12-07 00:13:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-07 00:13:00,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:00,602 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:00,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-07 00:13:00,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:00,803 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:13:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1330088725, now seen corresponding path program 26 times [2021-12-07 00:13:00,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:00,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416058276] [2021-12-07 00:13:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:00,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:01,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416058276] [2021-12-07 00:13:01,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416058276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578301952] [2021-12-07 00:13:01,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:13:01,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:01,438 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:01,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-07 00:13:01,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:13:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-07 00:13:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:01,610 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 00:13:02,145 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 00:13:02,199 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 00:13:02,452 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 00:13:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:02,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:02,659 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2626 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2626) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0)) is different from false [2021-12-07 00:13:02,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:13:02,663 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 00:13:02,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:13:02,667 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 00:13:02,669 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 00:13:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 28 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:02,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578301952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:02,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:02,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 62 [2021-12-07 00:13:02,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342238005] [2021-12-07 00:13:02,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:02,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-07 00:13:02,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-07 00:13:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3500, Unknown=1, NotChecked=118, Total=3782 [2021-12-07 00:13:02,973 INFO L87 Difference]: Start difference. First operand 13908 states and 15757 transitions. Second operand has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:06,932 INFO L93 Difference]: Finished difference Result 23616 states and 26595 transitions. [2021-12-07 00:13:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-07 00:13:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-07 00:13:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:06,944 INFO L225 Difference]: With dead ends: 23616 [2021-12-07 00:13:06,944 INFO L226 Difference]: Without dead ends: 18135 [2021-12-07 00:13:06,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 328 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=572, Invalid=13711, Unknown=1, NotChecked=236, Total=14520 [2021-12-07 00:13:06,945 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 730 mSDsluCounter, 13438 mSDsCounter, 0 mSdLazyCounter, 7678 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 13801 SdHoareTripleChecker+Invalid, 8302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:06,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 13801 Invalid, 8302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 7678 Invalid, 0 Unknown, 569 Unchecked, 2.2s Time] [2021-12-07 00:13:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2021-12-07 00:13:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 14083. [2021-12-07 00:13:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14083 states, 14081 states have (on average 1.1320218734464882) internal successors, (15940), 14082 states have internal predecessors, (15940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14083 states to 14083 states and 15940 transitions. [2021-12-07 00:13:07,071 INFO L78 Accepts]: Start accepts. Automaton has 14083 states and 15940 transitions. Word has length 177 [2021-12-07 00:13:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:07,071 INFO L470 AbstractCegarLoop]: Abstraction has 14083 states and 15940 transitions. [2021-12-07 00:13:07,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14083 states and 15940 transitions. [2021-12-07 00:13:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-07 00:13:07,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:07,074 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:07,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-07 00:13:07,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:07,275 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:13:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash -925327102, now seen corresponding path program 23 times [2021-12-07 00:13:07,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:07,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362189243] [2021-12-07 00:13:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:07,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 153 proven. 1022 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-12-07 00:13:07,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362189243] [2021-12-07 00:13:07,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362189243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594976128] [2021-12-07 00:13:07,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:13:07,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:07,709 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:07,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-07 00:13:08,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 00:13:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-07 00:13:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:08,027 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:13:08,027 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 00:13:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 190 proven. 1089 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-07 00:13:09,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 231 proven. 924 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-07 00:13:10,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594976128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:10,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:10,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 28] total 83 [2021-12-07 00:13:10,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283333370] [2021-12-07 00:13:10,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:10,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-07 00:13:10,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-07 00:13:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=6283, Unknown=0, NotChecked=0, Total=6972 [2021-12-07 00:13:10,502 INFO L87 Difference]: Start difference. First operand 14083 states and 15940 transitions. Second operand has 84 states, 83 states have (on average 4.421686746987952) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:13,473 INFO L93 Difference]: Finished difference Result 52365 states and 58851 transitions. [2021-12-07 00:13:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-07 00:13:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.421686746987952) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 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 177 [2021-12-07 00:13:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:13,514 INFO L225 Difference]: With dead ends: 52365 [2021-12-07 00:13:13,514 INFO L226 Difference]: Without dead ends: 52365 [2021-12-07 00:13:13,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3384, Invalid=14706, Unknown=0, NotChecked=0, Total=18090 [2021-12-07 00:13:13,515 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1021 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 2800 SdHoareTripleChecker+Invalid, 3692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:13,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 2800 Invalid, 3692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 00:13:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52365 states. [2021-12-07 00:13:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52365 to 14268. [2021-12-07 00:13:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14268 states, 14266 states have (on average 1.1328333099677554) internal successors, (16161), 14267 states have internal predecessors, (16161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 16161 transitions. [2021-12-07 00:13:13,781 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 16161 transitions. Word has length 177 [2021-12-07 00:13:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:13,782 INFO L470 AbstractCegarLoop]: Abstraction has 14268 states and 16161 transitions. [2021-12-07 00:13:13,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.421686746987952) internal successors, (367), 84 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 16161 transitions. [2021-12-07 00:13:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-07 00:13:13,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:13,785 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:13,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-07 00:13:13,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:13,986 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:13:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -285822824, now seen corresponding path program 27 times [2021-12-07 00:13:13,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:13,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497877920] [2021-12-07 00:13:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:13,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 276 proven. 858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:14,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497877920] [2021-12-07 00:13:14,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497877920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883655788] [2021-12-07 00:13:14,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:13:14,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:14,481 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:14,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-07 00:13:14,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-07 00:13:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-07 00:13:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:14,885 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 00:13:14,889 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 00:13:15,347 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 00:13:15,387 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 26 treesize of output 25 [2021-12-07 00:13:19,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:13:19,675 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 1 case distinctions, treesize of input 31 treesize of output 24 [2021-12-07 00:13:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 13 proven. 106 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2021-12-07 00:13:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:21,260 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 56 treesize of output 50 [2021-12-07 00:13:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:13:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2021-12-07 00:13:22,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883655788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:22,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:22,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12, 11] total 55 [2021-12-07 00:13:22,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307683689] [2021-12-07 00:13:22,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:22,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 00:13:22,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 00:13:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 00:13:22,043 INFO L87 Difference]: Start difference. First operand 14268 states and 16161 transitions. Second operand has 56 states, 55 states have (on average 4.363636363636363) internal successors, (240), 56 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:29,154 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:13:34,956 WARN L227 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:13:41,022 WARN L227 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:13:46,920 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:13:53,813 WARN L227 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:00,030 WARN L227 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:06,661 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:17,622 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:23,893 WARN L227 SmtUtils]: Spent 5.93s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:29,949 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:35,944 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:46,955 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:14:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:51,794 INFO L93 Difference]: Finished difference Result 14499 states and 16392 transitions. [2021-12-07 00:14:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-07 00:14:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.363636363636363) internal successors, (240), 56 states have internal predecessors, (240), 0 states have call successors, (0), 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 181 [2021-12-07 00:14:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:51,804 INFO L225 Difference]: With dead ends: 14499 [2021-12-07 00:14:51,804 INFO L226 Difference]: Without dead ends: 14189 [2021-12-07 00:14:51,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 382 SyntacticMatches, 44 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12398 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=2697, Invalid=27405, Unknown=0, NotChecked=0, Total=30102 [2021-12-07 00:14:51,806 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 402 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:51,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 3344 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1328 Invalid, 0 Unknown, 592 Unchecked, 0.5s Time] [2021-12-07 00:14:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14189 states. [2021-12-07 00:14:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14189 to 14189. [2021-12-07 00:14:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14189 states, 14187 states have (on average 1.1325861704377247) internal successors, (16068), 14188 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14189 states to 14189 states and 16068 transitions. [2021-12-07 00:14:51,917 INFO L78 Accepts]: Start accepts. Automaton has 14189 states and 16068 transitions. Word has length 181 [2021-12-07 00:14:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:51,917 INFO L470 AbstractCegarLoop]: Abstraction has 14189 states and 16068 transitions. [2021-12-07 00:14:51,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.363636363636363) internal successors, (240), 56 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 14189 states and 16068 transitions. [2021-12-07 00:14:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-07 00:14:51,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:51,921 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:51,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-07 00:14:52,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:52,122 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:14:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1094210890, now seen corresponding path program 24 times [2021-12-07 00:14:52,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565266038] [2021-12-07 00:14:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:52,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 157 proven. 1386 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:14:52,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565266038] [2021-12-07 00:14:52,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565266038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505882687] [2021-12-07 00:14:52,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:14:52,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:52,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:52,784 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:52,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-07 00:14:53,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-07 00:14:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:53,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 241 conjunts are in the unsatisfiable core [2021-12-07 00:14:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:53,260 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 00:14:53,650 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 00:14:53,686 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 6 treesize of output 5 [2021-12-07 00:14:53,709 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 00:14:54,387 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 00:14:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 157 proven. 1386 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:14:54,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 157 proven. 1155 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-07 00:14:55,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505882687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:55,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:55,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 31] total 92 [2021-12-07 00:14:55,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321953670] [2021-12-07 00:14:55,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:55,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-07 00:14:55,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-07 00:14:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=8070, Unknown=0, NotChecked=0, Total=8372 [2021-12-07 00:14:55,159 INFO L87 Difference]: Start difference. First operand 14189 states and 16068 transitions. Second operand has 92 states, 92 states have (on average 4.032608695652174) internal successors, (371), 92 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:19,847 INFO L93 Difference]: Finished difference Result 64554 states and 72270 transitions. [2021-12-07 00:15:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2021-12-07 00:15:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.032608695652174) internal successors, (371), 92 states have internal predecessors, (371), 0 states have call successors, (0), 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 182 [2021-12-07 00:15:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:19,901 INFO L225 Difference]: With dead ends: 64554 [2021-12-07 00:15:19,901 INFO L226 Difference]: Without dead ends: 63692 [2021-12-07 00:15:19,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65268 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=6469, Invalid=192893, Unknown=0, NotChecked=0, Total=199362 [2021-12-07 00:15:19,910 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 3798 mSDsluCounter, 37670 mSDsCounter, 0 mSdLazyCounter, 30751 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3798 SdHoareTripleChecker+Valid, 38358 SdHoareTripleChecker+Invalid, 31545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 30751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:19,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3798 Valid, 38358 Invalid, 31545 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [794 Valid, 30751 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-12-07 00:15:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63692 states. [2021-12-07 00:15:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63692 to 14259. [2021-12-07 00:15:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14259 states, 14257 states have (on average 1.1312337798975942) internal successors, (16128), 14258 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14259 states to 14259 states and 16128 transitions. [2021-12-07 00:15:20,247 INFO L78 Accepts]: Start accepts. Automaton has 14259 states and 16128 transitions. Word has length 182 [2021-12-07 00:15:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:20,248 INFO L470 AbstractCegarLoop]: Abstraction has 14259 states and 16128 transitions. [2021-12-07 00:15:20,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.032608695652174) internal successors, (371), 92 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 14259 states and 16128 transitions. [2021-12-07 00:15:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-07 00:15:20,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:20,251 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:20,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-07 00:15:20,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:20,452 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:15:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash -978556822, now seen corresponding path program 25 times [2021-12-07 00:15:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709666158] [2021-12-07 00:15:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:20,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 48 proven. 1281 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:20,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:20,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709666158] [2021-12-07 00:15:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709666158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:15:20,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035528521] [2021-12-07 00:15:20,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:15:20,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:20,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:20,918 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:20,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-07 00:15:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:21,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-07 00:15:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:21,364 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 00:15:21,884 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 00:15:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 48 proven. 1281 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:21,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:22,115 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 13 [2021-12-07 00:15:22,116 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 26 treesize of output 22 [2021-12-07 00:15:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 48 proven. 1281 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:22,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035528521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:22,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:15:22,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2021-12-07 00:15:22,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264290348] [2021-12-07 00:15:22,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:22,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 00:15:22,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 00:15:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 00:15:22,270 INFO L87 Difference]: Start difference. First operand 14259 states and 16128 transitions. Second operand has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 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 00:15:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:25,638 INFO L93 Difference]: Finished difference Result 65592 states and 73846 transitions. [2021-12-07 00:15:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 00:15:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-07 00:15:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:25,682 INFO L225 Difference]: With dead ends: 65592 [2021-12-07 00:15:25,683 INFO L226 Difference]: Without dead ends: 63873 [2021-12-07 00:15:25,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 361 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1042, Invalid=11614, Unknown=0, NotChecked=0, Total=12656 [2021-12-07 00:15:25,683 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 723 mSDsluCounter, 7984 mSDsCounter, 0 mSdLazyCounter, 6077 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 8246 SdHoareTripleChecker+Invalid, 6282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:25,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 8246 Invalid, 6282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6077 Invalid, 0 Unknown, 126 Unchecked, 1.7s Time] [2021-12-07 00:15:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63873 states. [2021-12-07 00:15:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63873 to 15969. [2021-12-07 00:15:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15967 states have (on average 1.134590092064884) internal successors, (18116), 15968 states have internal predecessors, (18116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 18116 transitions. [2021-12-07 00:15:26,016 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 18116 transitions. Word has length 187 [2021-12-07 00:15:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 15969 states and 18116 transitions. [2021-12-07 00:15:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 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 00:15:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 18116 transitions. [2021-12-07 00:15:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-07 00:15:26,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:26,021 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:26,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-07 00:15:26,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-07 00:15:26,222 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:15:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -76350349, now seen corresponding path program 3 times [2021-12-07 00:15:26,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:26,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785221931] [2021-12-07 00:15:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:26,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 259 proven. 15 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-12-07 00:15:26,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785221931] [2021-12-07 00:15:26,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785221931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:15:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532267815] [2021-12-07 00:15:26,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:15:26,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:26,319 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:26,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-07 00:15:26,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-07 00:15:26,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:15:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:26,613 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 00:15:26,970 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 16 treesize of output 8 [2021-12-07 00:15:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 67 proven. 135 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-12-07 00:15:26,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 132 proven. 70 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-12-07 00:15:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532267815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:27,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:15:27,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2021-12-07 00:15:27,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10199864] [2021-12-07 00:15:27,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:27,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:15:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:15:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:15:27,215 INFO L87 Difference]: Start difference. First operand 15969 states and 18116 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:27,443 INFO L93 Difference]: Finished difference Result 15829 states and 17788 transitions. [2021-12-07 00:15:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:15:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-07 00:15:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:27,454 INFO L225 Difference]: With dead ends: 15829 [2021-12-07 00:15:27,454 INFO L226 Difference]: Without dead ends: 15829 [2021-12-07 00:15:27,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:15:27,455 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:27,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 316 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15829 states. [2021-12-07 00:15:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15829 to 9975. [2021-12-07 00:15:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9973 states have (on average 1.1171162137771984) internal successors, (11141), 9974 states have internal predecessors, (11141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 11141 transitions. [2021-12-07 00:15:27,548 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 11141 transitions. Word has length 190 [2021-12-07 00:15:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:27,548 INFO L470 AbstractCegarLoop]: Abstraction has 9975 states and 11141 transitions. [2021-12-07 00:15:27,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 11141 transitions. [2021-12-07 00:15:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-07 00:15:27,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:27,552 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:27,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-07 00:15:27,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:27,753 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:15:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1933579667, now seen corresponding path program 26 times [2021-12-07 00:15:27,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:27,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269752958] [2021-12-07 00:15:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:27,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 190 proven. 1184 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:28,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269752958] [2021-12-07 00:15:28,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269752958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:15:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193134584] [2021-12-07 00:15:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:15:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:28,268 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:28,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-07 00:15:28,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:15:28,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:28,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-07 00:15:28,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 231 proven. 1143 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:28,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:29,772 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 00:15:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 231 proven. 1143 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-07 00:15:29,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193134584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:29,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:15:29,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 66 [2021-12-07 00:15:29,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324823875] [2021-12-07 00:15:29,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:29,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 00:15:29,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 00:15:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3957, Unknown=0, NotChecked=0, Total=4422 [2021-12-07 00:15:29,854 INFO L87 Difference]: Start difference. First operand 9975 states and 11141 transitions. Second operand has 67 states, 66 states have (on average 4.242424242424242) internal successors, (280), 67 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:32,489 INFO L93 Difference]: Finished difference Result 35348 states and 39299 transitions. [2021-12-07 00:15:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-07 00:15:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.242424242424242) internal successors, (280), 67 states have internal predecessors, (280), 0 states have call successors, (0), 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 191 [2021-12-07 00:15:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:32,512 INFO L225 Difference]: With dead ends: 35348 [2021-12-07 00:15:32,512 INFO L226 Difference]: Without dead ends: 35348 [2021-12-07 00:15:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2139, Invalid=9203, Unknown=0, NotChecked=0, Total=11342 [2021-12-07 00:15:32,513 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 712 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:32,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 3489 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 00:15:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-12-07 00:15:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 10105. [2021-12-07 00:15:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10105 states, 10103 states have (on average 1.1180837375037118) internal successors, (11296), 10104 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10105 states to 10105 states and 11296 transitions. [2021-12-07 00:15:32,681 INFO L78 Accepts]: Start accepts. Automaton has 10105 states and 11296 transitions. Word has length 191 [2021-12-07 00:15:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:32,681 INFO L470 AbstractCegarLoop]: Abstraction has 10105 states and 11296 transitions. [2021-12-07 00:15:32,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.242424242424242) internal successors, (280), 67 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10105 states and 11296 transitions. [2021-12-07 00:15:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-07 00:15:32,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:32,685 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:32,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-07 00:15:32,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-07 00:15:32,886 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:15:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1684239317, now seen corresponding path program 27 times [2021-12-07 00:15:32,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057693225] [2021-12-07 00:15:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:32,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 171 proven. 1656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:15:33,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057693225] [2021-12-07 00:15:33,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057693225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:15:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320187956] [2021-12-07 00:15:33,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:15:33,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:33,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:33,636 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:33,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-07 00:15:34,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-07 00:15:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 279 conjunts are in the unsatisfiable core [2021-12-07 00:15:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:34,169 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 00:15:34,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 00:15:35,054 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 00:15:35,119 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 00:15:37,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2021-12-07 00:15:38,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-12-07 00:15:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 169 proven. 1658 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:15:38,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 171 proven. 1380 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-07 00:15:40,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320187956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:40,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:15:40,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53, 35] total 117 [2021-12-07 00:15:40,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117183564] [2021-12-07 00:15:40,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:40,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-07 00:15:40,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-07 00:15:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=13115, Unknown=0, NotChecked=0, Total=13572 [2021-12-07 00:15:40,486 INFO L87 Difference]: Start difference. First operand 10105 states and 11296 transitions. Second operand has 117 states, 117 states have (on average 3.9316239316239314) internal successors, (460), 117 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:16:12,541 INFO L93 Difference]: Finished difference Result 44685 states and 49441 transitions. [2021-12-07 00:16:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 465 states. [2021-12-07 00:16:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.9316239316239314) internal successors, (460), 117 states have internal predecessors, (460), 0 states have call successors, (0), 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 196 [2021-12-07 00:16:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:16:12,568 INFO L225 Difference]: With dead ends: 44685 [2021-12-07 00:16:12,568 INFO L226 Difference]: Without dead ends: 43695 [2021-12-07 00:16:12,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 467 SyntacticMatches, 27 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127703 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=8405, Invalid=297957, Unknown=0, NotChecked=0, Total=306362 [2021-12-07 00:16:12,579 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 2475 mSDsluCounter, 44585 mSDsCounter, 0 mSdLazyCounter, 33289 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 45328 SdHoareTripleChecker+Invalid, 41461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 33289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7758 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:16:12,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2475 Valid, 45328 Invalid, 41461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 33289 Invalid, 0 Unknown, 7758 Unchecked, 11.2s Time] [2021-12-07 00:16:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43695 states. [2021-12-07 00:16:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43695 to 10175. [2021-12-07 00:16:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10175 states, 10173 states have (on average 1.116288213899538) internal successors, (11356), 10174 states have internal predecessors, (11356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10175 states to 10175 states and 11356 transitions. [2021-12-07 00:16:12,761 INFO L78 Accepts]: Start accepts. Automaton has 10175 states and 11356 transitions. Word has length 196 [2021-12-07 00:16:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:16:12,762 INFO L470 AbstractCegarLoop]: Abstraction has 10175 states and 11356 transitions. [2021-12-07 00:16:12,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.9316239316239314) internal successors, (460), 117 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10175 states and 11356 transitions. [2021-12-07 00:16:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-07 00:16:12,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:16:12,765 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:16:12,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-07 00:16:12,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-07 00:16:12,966 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:16:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:16:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2094953659, now seen corresponding path program 28 times [2021-12-07 00:16:12,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:16:12,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281732521] [2021-12-07 00:16:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:16:12,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:16:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:16:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 52 proven. 1511 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-12-07 00:16:13,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:16:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281732521] [2021-12-07 00:16:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281732521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:16:13,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704806727] [2021-12-07 00:16:13,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:16:13,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:16:13,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:16:13,475 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:16:13,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-07 00:16:13,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:16:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:16:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 217 conjunts are in the unsatisfiable core [2021-12-07 00:16:13,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:16:13,652 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:16:13,652 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 00:16:14,130 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 00:16:15,423 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 00:16:15,670 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 00:16:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 383 proven. 1573 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:16:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:16:16,690 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 13 [2021-12-07 00:16:16,692 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 26 treesize of output 22 [2021-12-07 00:16:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 421 proven. 1535 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:16:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704806727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:16:17,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:16:17,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 51] total 105 [2021-12-07 00:16:17,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785875174] [2021-12-07 00:16:17,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:16:17,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-07 00:16:17,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:16:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-07 00:16:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=10019, Unknown=0, NotChecked=0, Total=10920 [2021-12-07 00:16:17,707 INFO L87 Difference]: Start difference. First operand 10175 states and 11356 transitions. Second operand has 105 states, 105 states have (on average 3.8380952380952382) internal successors, (403), 105 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:16:21,717 INFO L93 Difference]: Finished difference Result 24755 states and 27631 transitions. [2021-12-07 00:16:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-07 00:16:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.8380952380952382) internal successors, (403), 105 states have internal predecessors, (403), 0 states have call successors, (0), 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 201 [2021-12-07 00:16:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:16:21,733 INFO L225 Difference]: With dead ends: 24755 [2021-12-07 00:16:21,733 INFO L226 Difference]: Without dead ends: 22947 [2021-12-07 00:16:21,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 9751 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3314, Invalid=30726, Unknown=0, NotChecked=0, Total=34040 [2021-12-07 00:16:21,735 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 345 mSDsluCounter, 4067 mSDsCounter, 0 mSdLazyCounter, 3147 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 4174 SdHoareTripleChecker+Invalid, 3586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 3147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:16:21,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 4174 Invalid, 3586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 3147 Invalid, 0 Unknown, 240 Unchecked, 1.0s Time] [2021-12-07 00:16:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22947 states. [2021-12-07 00:16:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22947 to 11244. [2021-12-07 00:16:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11244 states, 11242 states have (on average 1.11999644191425) internal successors, (12591), 11243 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11244 states to 11244 states and 12591 transitions. [2021-12-07 00:16:21,857 INFO L78 Accepts]: Start accepts. Automaton has 11244 states and 12591 transitions. Word has length 201 [2021-12-07 00:16:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:16:21,857 INFO L470 AbstractCegarLoop]: Abstraction has 11244 states and 12591 transitions. [2021-12-07 00:16:21,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.8380952380952382) internal successors, (403), 105 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 11244 states and 12591 transitions. [2021-12-07 00:16:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-07 00:16:21,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:16:21,861 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:16:21,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-07 00:16:22,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-07 00:16:22,062 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:16:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:16:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1719389192, now seen corresponding path program 29 times [2021-12-07 00:16:22,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:16:22,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89586525] [2021-12-07 00:16:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:16:22,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:16:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:16:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 231 proven. 1405 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-12-07 00:16:22,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:16:22,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89586525] [2021-12-07 00:16:22,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89586525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:16:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948026840] [2021-12-07 00:16:22,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:16:22,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:16:22,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:16:22,554 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:16:22,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-07 00:16:22,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-07 00:16:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:16:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-07 00:16:22,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:16:22,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:16:22,813 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 00:16:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 276 proven. 1336 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-12-07 00:16:24,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:16:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 325 proven. 1287 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-12-07 00:16:25,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948026840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:16:25,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:16:25,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32, 32] total 95 [2021-12-07 00:16:25,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740682569] [2021-12-07 00:16:25,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:16:25,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-07 00:16:25,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:16:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-07 00:16:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=8224, Unknown=0, NotChecked=0, Total=9120 [2021-12-07 00:16:25,802 INFO L87 Difference]: Start difference. First operand 11244 states and 12591 transitions. Second operand has 96 states, 95 states have (on average 4.378947368421053) internal successors, (416), 96 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:16:29,490 INFO L93 Difference]: Finished difference Result 43010 states and 48000 transitions. [2021-12-07 00:16:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-07 00:16:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.378947368421053) internal successors, (416), 96 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-07 00:16:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:16:29,518 INFO L225 Difference]: With dead ends: 43010 [2021-12-07 00:16:29,518 INFO L226 Difference]: Without dead ends: 43010 [2021-12-07 00:16:29,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4424, Invalid=18832, Unknown=0, NotChecked=0, Total=23256 [2021-12-07 00:16:29,520 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 991 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 3874 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 3075 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:16:29,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 3075 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3874 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 00:16:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43010 states. [2021-12-07 00:16:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43010 to 11374. [2021-12-07 00:16:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11374 states, 11372 states have (on average 1.120823074217376) internal successors, (12746), 11373 states have internal predecessors, (12746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11374 states to 11374 states and 12746 transitions. [2021-12-07 00:16:29,721 INFO L78 Accepts]: Start accepts. Automaton has 11374 states and 12746 transitions. Word has length 205 [2021-12-07 00:16:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:16:29,721 INFO L470 AbstractCegarLoop]: Abstraction has 11374 states and 12746 transitions. [2021-12-07 00:16:29,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.378947368421053) internal successors, (416), 96 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11374 states and 12746 transitions. [2021-12-07 00:16:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-07 00:16:29,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:16:29,725 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:16:29,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-07 00:16:29,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:16:29,926 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:16:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:16:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1717275792, now seen corresponding path program 30 times [2021-12-07 00:16:29,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:16:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461471119] [2021-12-07 00:16:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:16:29,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:16:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:16:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2138 backedges. 185 proven. 1950 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:16:30,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:16:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461471119] [2021-12-07 00:16:30,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461471119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:16:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537812932] [2021-12-07 00:16:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:16:30,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:16:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:16:30,732 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:16:30,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-07 00:16:31,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-07 00:16:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:16:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 258 conjunts are in the unsatisfiable core [2021-12-07 00:16:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:16:31,749 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 6 treesize of output 5 [2021-12-07 00:16:32,587 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 00:16:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2138 backedges. 185 proven. 1949 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:16:32,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:16:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2138 backedges. 185 proven. 1625 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-12-07 00:16:33,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537812932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:16:33,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:16:33,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 47, 35] total 99 [2021-12-07 00:16:33,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134414399] [2021-12-07 00:16:33,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:16:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-07 00:16:33,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:16:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-07 00:16:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=9377, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 00:16:33,550 INFO L87 Difference]: Start difference. First operand 11374 states and 12746 transitions. Second operand has 99 states, 99 states have (on average 4.181818181818182) internal successors, (414), 99 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:17:03,038 INFO L93 Difference]: Finished difference Result 54657 states and 60717 transitions. [2021-12-07 00:17:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-12-07 00:17:03,038 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.181818181818182) internal successors, (414), 99 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-12-07 00:17:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:17:03,077 INFO L225 Difference]: With dead ends: 54657 [2021-12-07 00:17:03,077 INFO L226 Difference]: Without dead ends: 53665 [2021-12-07 00:17:03,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92558 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=7568, Invalid=266484, Unknown=0, NotChecked=0, Total=274052 [2021-12-07 00:17:03,088 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 2103 mSDsluCounter, 48267 mSDsCounter, 0 mSdLazyCounter, 39596 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 49047 SdHoareTripleChecker+Invalid, 39996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 39596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:17:03,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2103 Valid, 49047 Invalid, 39996 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [400 Valid, 39596 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-12-07 00:17:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53665 states. [2021-12-07 00:17:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53665 to 11444. [2021-12-07 00:17:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11442 states have (on average 1.1192099283342074) internal successors, (12806), 11443 states have internal predecessors, (12806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 12806 transitions. [2021-12-07 00:17:03,329 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 12806 transitions. Word has length 210 [2021-12-07 00:17:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:17:03,329 INFO L470 AbstractCegarLoop]: Abstraction has 11444 states and 12806 transitions. [2021-12-07 00:17:03,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.181818181818182) internal successors, (414), 99 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 12806 transitions. [2021-12-07 00:17:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-07 00:17:03,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:17:03,333 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:03,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-07 00:17:03,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:03,534 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:17:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1017085456, now seen corresponding path program 31 times [2021-12-07 00:17:03,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686199834] [2021-12-07 00:17:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 56 proven. 1760 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:04,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686199834] [2021-12-07 00:17:04,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686199834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655639225] [2021-12-07 00:17:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:17:04,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:04,123 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:04,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-07 00:17:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:04,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-07 00:17:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:17:04,639 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 00:17:05,219 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 00:17:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 56 proven. 1760 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:05,511 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 13 [2021-12-07 00:17:05,512 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 26 treesize of output 22 [2021-12-07 00:17:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 56 proven. 1760 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:05,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655639225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:05,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:05,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 63 [2021-12-07 00:17:05,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68121670] [2021-12-07 00:17:05,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-07 00:17:05,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-07 00:17:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2021-12-07 00:17:05,699 INFO L87 Difference]: Start difference. First operand 11444 states and 12806 transitions. Second operand has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:17:09,762 INFO L93 Difference]: Finished difference Result 53245 states and 59456 transitions. [2021-12-07 00:17:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-07 00:17:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 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 215 [2021-12-07 00:17:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:17:09,801 INFO L225 Difference]: With dead ends: 53245 [2021-12-07 00:17:09,801 INFO L226 Difference]: Without dead ends: 51276 [2021-12-07 00:17:09,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 403 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1149, Invalid=14601, Unknown=0, NotChecked=0, Total=15750 [2021-12-07 00:17:09,802 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 1114 mSDsluCounter, 9946 mSDsCounter, 0 mSdLazyCounter, 7043 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 10253 SdHoareTripleChecker+Invalid, 7504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 7043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:17:09,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 10253 Invalid, 7504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 7043 Invalid, 0 Unknown, 323 Unchecked, 2.0s Time] [2021-12-07 00:17:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51276 states. [2021-12-07 00:17:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51276 to 12583. [2021-12-07 00:17:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12583 states, 12581 states have (on average 1.1227247436610763) internal successors, (14125), 12582 states have internal predecessors, (14125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12583 states to 12583 states and 14125 transitions. [2021-12-07 00:17:10,036 INFO L78 Accepts]: Start accepts. Automaton has 12583 states and 14125 transitions. Word has length 215 [2021-12-07 00:17:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:17:10,036 INFO L470 AbstractCegarLoop]: Abstraction has 12583 states and 14125 transitions. [2021-12-07 00:17:10,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 12583 states and 14125 transitions. [2021-12-07 00:17:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-07 00:17:10,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:17:10,040 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:10,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-07 00:17:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:10,241 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:17:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2057409432, now seen corresponding path program 4 times [2021-12-07 00:17:10,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:10,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995303810] [2021-12-07 00:17:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:10,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 28 proven. 1750 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 00:17:11,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995303810] [2021-12-07 00:17:11,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995303810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507318397] [2021-12-07 00:17:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:17:11,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:11,074 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:11,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-07 00:17:11,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:17:11,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:17:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-07 00:17:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:17:11,288 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:17:11,288 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 00:17:12,195 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 00:17:12,278 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:17:12,278 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 00:17:12,283 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 00:17:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:17:15,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:17:15,478 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:17:15,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-12-07 00:17:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 807 proven. 972 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-07 00:17:15,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:18,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:17:18,077 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 45 treesize of output 34 [2021-12-07 00:17:18,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:17:18,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:17:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2021-12-07 00:17:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:17:18,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:17:18,095 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 31 treesize of output 39 [2021-12-07 00:17:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 1304 proven. 474 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 00:17:20,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507318397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:20,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:20,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41, 39] total 109 [2021-12-07 00:17:20,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253587490] [2021-12-07 00:17:20,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:20,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-07 00:17:20,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-07 00:17:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=10943, Unknown=1, NotChecked=0, Total=11772 [2021-12-07 00:17:20,409 INFO L87 Difference]: Start difference. First operand 12583 states and 14125 transitions. Second operand has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 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 00:17:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:17:25,985 INFO L93 Difference]: Finished difference Result 24154 states and 26883 transitions. [2021-12-07 00:17:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-07 00:17:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 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) Word has length 217 [2021-12-07 00:17:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:17:25,993 INFO L225 Difference]: With dead ends: 24154 [2021-12-07 00:17:25,993 INFO L226 Difference]: Without dead ends: 17099 [2021-12-07 00:17:25,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 406 SyntacticMatches, 8 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2257, Invalid=27498, Unknown=1, NotChecked=0, Total=29756 [2021-12-07 00:17:25,994 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 584 mSDsluCounter, 6749 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 6876 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:17:25,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 6876 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2861 Invalid, 0 Unknown, 1166 Unchecked, 0.9s Time] [2021-12-07 00:17:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17099 states. [2021-12-07 00:17:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17099 to 12149. [2021-12-07 00:17:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12149 states, 12147 states have (on average 1.1198649872396476) internal successors, (13603), 12148 states have internal predecessors, (13603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12149 states to 12149 states and 13603 transitions. [2021-12-07 00:17:26,090 INFO L78 Accepts]: Start accepts. Automaton has 12149 states and 13603 transitions. Word has length 217 [2021-12-07 00:17:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:17:26,090 INFO L470 AbstractCegarLoop]: Abstraction has 12149 states and 13603 transitions. [2021-12-07 00:17:26,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.541284403669724) internal successors, (495), 109 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 00:17:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12149 states and 13603 transitions. [2021-12-07 00:17:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-07 00:17:26,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:17:26,093 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:26,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-07 00:17:26,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:26,295 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:17:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 233615731, now seen corresponding path program 32 times [2021-12-07 00:17:26,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683619001] [2021-12-07 00:17:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:26,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2328 backedges. 276 proven. 1593 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683619001] [2021-12-07 00:17:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683619001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414083560] [2021-12-07 00:17:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:17:26,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:26,899 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:26,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-07 00:17:27,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:17:27,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:17:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-07 00:17:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:17:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2328 backedges. 325 proven. 1544 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:28,583 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 00:17:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2328 backedges. 325 proven. 1544 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 00:17:28,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414083560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:28,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:28,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 74 [2021-12-07 00:17:28,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838850767] [2021-12-07 00:17:28,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:28,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-07 00:17:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-07 00:17:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=4961, Unknown=0, NotChecked=0, Total=5550 [2021-12-07 00:17:28,663 INFO L87 Difference]: Start difference. First operand 12149 states and 13603 transitions. Second operand has 75 states, 74 states have (on average 4.27027027027027) internal successors, (316), 75 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:17:31,400 INFO L93 Difference]: Finished difference Result 51259 states and 57371 transitions. [2021-12-07 00:17:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-07 00:17:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 4.27027027027027) internal successors, (316), 75 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-12-07 00:17:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:17:31,436 INFO L225 Difference]: With dead ends: 51259 [2021-12-07 00:17:31,436 INFO L226 Difference]: Without dead ends: 51259 [2021-12-07 00:17:31,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 397 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2742, Invalid=11778, Unknown=0, NotChecked=0, Total=14520 [2021-12-07 00:17:31,437 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 858 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 4158 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 4248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:17:31,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 3302 Invalid, 4248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 00:17:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51259 states. [2021-12-07 00:17:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51259 to 12279. [2021-12-07 00:17:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12279 states, 12277 states have (on average 1.1206320762401238) internal successors, (13758), 12278 states have internal predecessors, (13758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12279 states to 12279 states and 13758 transitions. [2021-12-07 00:17:31,674 INFO L78 Accepts]: Start accepts. Automaton has 12279 states and 13758 transitions. Word has length 219 [2021-12-07 00:17:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:17:31,674 INFO L470 AbstractCegarLoop]: Abstraction has 12279 states and 13758 transitions. [2021-12-07 00:17:31,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 4.27027027027027) internal successors, (316), 75 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 12279 states and 13758 transitions. [2021-12-07 00:17:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-07 00:17:31,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:17:31,678 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:31,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-07 00:17:31,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:31,879 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:17:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1802422043, now seen corresponding path program 33 times [2021-12-07 00:17:31,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:31,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767087196] [2021-12-07 00:17:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:31,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2470 backedges. 199 proven. 2268 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:17:32,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767087196] [2021-12-07 00:17:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767087196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:32,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421607324] [2021-12-07 00:17:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:17:32,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:32,861 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:32,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-07 00:17:33,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-07 00:17:33,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:17:33,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 274 conjunts are in the unsatisfiable core [2021-12-07 00:17:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:17:33,850 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 6 treesize of output 5 [2021-12-07 00:17:34,755 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 00:17:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2470 backedges. 199 proven. 2267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:17:34,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2470 backedges. 199 proven. 1890 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-12-07 00:17:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421607324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:35,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:35,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 50, 37] total 104 [2021-12-07 00:17:35,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445508843] [2021-12-07 00:17:35,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-07 00:17:35,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-07 00:17:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=10370, Unknown=0, NotChecked=0, Total=10712 [2021-12-07 00:17:35,896 INFO L87 Difference]: Start difference. First operand 12279 states and 13758 transitions. Second operand has 104 states, 104 states have (on average 4.230769230769231) internal successors, (440), 104 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:10,179 INFO L93 Difference]: Finished difference Result 65547 states and 73016 transitions. [2021-12-07 00:18:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 495 states. [2021-12-07 00:18:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.230769230769231) internal successors, (440), 104 states have internal predecessors, (440), 0 states have call successors, (0), 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 224 [2021-12-07 00:18:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:10,224 INFO L225 Difference]: With dead ends: 65547 [2021-12-07 00:18:10,224 INFO L226 Difference]: Without dead ends: 64490 [2021-12-07 00:18:10,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116158 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=8485, Invalid=329657, Unknown=0, NotChecked=0, Total=338142 [2021-12-07 00:18:10,236 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 2783 mSDsluCounter, 54337 mSDsCounter, 0 mSdLazyCounter, 43828 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2783 SdHoareTripleChecker+Valid, 55239 SdHoareTripleChecker+Invalid, 44282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 43828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:10,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2783 Valid, 55239 Invalid, 44282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [454 Valid, 43828 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2021-12-07 00:18:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64490 states. [2021-12-07 00:18:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64490 to 12349. [2021-12-07 00:18:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12349 states, 12347 states have (on average 1.1190572608730867) internal successors, (13817), 12348 states have internal predecessors, (13817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12349 states to 12349 states and 13817 transitions. [2021-12-07 00:18:10,499 INFO L78 Accepts]: Start accepts. Automaton has 12349 states and 13817 transitions. Word has length 224 [2021-12-07 00:18:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:10,499 INFO L470 AbstractCegarLoop]: Abstraction has 12349 states and 13817 transitions. [2021-12-07 00:18:10,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.230769230769231) internal successors, (440), 104 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 12349 states and 13817 transitions. [2021-12-07 00:18:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-07 00:18:10,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:10,503 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:10,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-07 00:18:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-07 00:18:10,704 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:18:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -259128117, now seen corresponding path program 34 times [2021-12-07 00:18:10,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999077650] [2021-12-07 00:18:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2617 backedges. 60 proven. 2028 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-07 00:18:11,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:11,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999077650] [2021-12-07 00:18:11,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999077650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:11,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460935343] [2021-12-07 00:18:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:18:11,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:11,327 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:11,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-07 00:18:11,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:18:11,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:18:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 247 conjunts are in the unsatisfiable core [2021-12-07 00:18:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:11,520 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:18:11,520 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 00:18:12,091 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 00:18:13,643 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 00:18:13,945 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 00:18:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2617 backedges. 516 proven. 2100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:18:13,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:15,165 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 13 [2021-12-07 00:18:15,166 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 26 treesize of output 22 [2021-12-07 00:18:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2617 backedges. 560 proven. 2056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:18:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460935343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:16,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:16,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57, 57] total 117 [2021-12-07 00:18:16,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706552996] [2021-12-07 00:18:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-07 00:18:16,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-07 00:18:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1115, Invalid=12457, Unknown=0, NotChecked=0, Total=13572 [2021-12-07 00:18:16,365 INFO L87 Difference]: Start difference. First operand 12349 states and 13817 transitions. Second operand has 117 states, 117 states have (on average 3.905982905982906) internal successors, (457), 117 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:21,355 INFO L93 Difference]: Finished difference Result 30971 states and 34752 transitions. [2021-12-07 00:18:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-07 00:18:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.905982905982906) internal successors, (457), 117 states have internal predecessors, (457), 0 states have call successors, (0), 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 229 [2021-12-07 00:18:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:21,376 INFO L225 Difference]: With dead ends: 30971 [2021-12-07 00:18:21,376 INFO L226 Difference]: Without dead ends: 28832 [2021-12-07 00:18:21,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 398 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4262, Invalid=40048, Unknown=0, NotChecked=0, Total=44310 [2021-12-07 00:18:21,378 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 327 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 4140 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 4140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:21,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 4646 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 4140 Invalid, 0 Unknown, 338 Unchecked, 1.2s Time] [2021-12-07 00:18:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28832 states. [2021-12-07 00:18:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28832 to 13502. [2021-12-07 00:18:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13502 states, 13500 states have (on average 1.1225185185185185) internal successors, (15154), 13501 states have internal predecessors, (15154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13502 states to 13502 states and 15154 transitions. [2021-12-07 00:18:21,540 INFO L78 Accepts]: Start accepts. Automaton has 13502 states and 15154 transitions. Word has length 229 [2021-12-07 00:18:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:21,541 INFO L470 AbstractCegarLoop]: Abstraction has 13502 states and 15154 transitions. [2021-12-07 00:18:21,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.905982905982906) internal successors, (457), 117 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 13502 states and 15154 transitions. [2021-12-07 00:18:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-07 00:18:21,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:21,544 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:21,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-07 00:18:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:21,745 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:18:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 434328334, now seen corresponding path program 35 times [2021-12-07 00:18:21,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:21,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410430945] [2021-12-07 00:18:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:21,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 325 proven. 1848 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-12-07 00:18:22,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410430945] [2021-12-07 00:18:22,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410430945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892914801] [2021-12-07 00:18:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:18:22,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:22,351 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:22,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-07 00:18:22,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-07 00:18:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:18:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 161 conjunts are in the unsatisfiable core [2021-12-07 00:18:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:22,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:18:22,761 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 00:18:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 378 proven. 1767 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-07 00:18:24,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 435 proven. 1710 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-07 00:18:26,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892914801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:26,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:26,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36, 36] total 107 [2021-12-07 00:18:26,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893588717] [2021-12-07 00:18:26,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:26,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-07 00:18:26,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-07 00:18:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=10425, Unknown=0, NotChecked=0, Total=11556 [2021-12-07 00:18:26,538 INFO L87 Difference]: Start difference. First operand 13502 states and 15154 transitions. Second operand has 108 states, 107 states have (on average 4.392523364485982) internal successors, (470), 108 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:31,167 INFO L93 Difference]: Finished difference Result 60972 states and 68467 transitions. [2021-12-07 00:18:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-07 00:18:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.392523364485982) internal successors, (470), 108 states have internal predecessors, (470), 0 states have call successors, (0), 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 233 [2021-12-07 00:18:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:31,211 INFO L225 Difference]: With dead ends: 60972 [2021-12-07 00:18:31,211 INFO L226 Difference]: Without dead ends: 60972 [2021-12-07 00:18:31,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6616 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5656, Invalid=24100, Unknown=0, NotChecked=0, Total=29756 [2021-12-07 00:18:31,213 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1227 mSDsluCounter, 4257 mSDsCounter, 0 mSdLazyCounter, 5674 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 4378 SdHoareTripleChecker+Invalid, 5814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 5674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:31,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 4378 Invalid, 5814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 5674 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:18:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60972 states. [2021-12-07 00:18:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60972 to 13632. [2021-12-07 00:18:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13632 states, 13630 states have (on average 1.1231841526045487) internal successors, (15309), 13631 states have internal predecessors, (15309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13632 states to 13632 states and 15309 transitions. [2021-12-07 00:18:31,489 INFO L78 Accepts]: Start accepts. Automaton has 13632 states and 15309 transitions. Word has length 233 [2021-12-07 00:18:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:31,490 INFO L470 AbstractCegarLoop]: Abstraction has 13632 states and 15309 transitions. [2021-12-07 00:18:31,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.392523364485982) internal successors, (470), 108 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 13632 states and 15309 transitions. [2021-12-07 00:18:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-07 00:18:31,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:31,494 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:31,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-07 00:18:31,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-07 00:18:31,694 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:18:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1461084202, now seen corresponding path program 36 times [2021-12-07 00:18:31,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:31,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893978495] [2021-12-07 00:18:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:31,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 213 proven. 2610 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:18:32,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893978495] [2021-12-07 00:18:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893978495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:32,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076149755] [2021-12-07 00:18:32,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:18:32,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:32,742 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-07 00:18:34,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-07 00:18:34,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:18:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 184 conjunts are in the unsatisfiable core [2021-12-07 00:18:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:34,572 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 00:18:35,339 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 00:18:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 62 proven. 2235 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-07 00:18:35,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:35,658 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 13 [2021-12-07 00:18:35,659 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 26 treesize of output 22 [2021-12-07 00:18:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 62 proven. 2235 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-07 00:18:35,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076149755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:35,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:35,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 41, 41] total 87 [2021-12-07 00:18:35,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631012921] [2021-12-07 00:18:35,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:35,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-07 00:18:35,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-07 00:18:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=7240, Unknown=0, NotChecked=0, Total=7482 [2021-12-07 00:18:35,894 INFO L87 Difference]: Start difference. First operand 13632 states and 15309 transitions. Second operand has 87 states, 87 states have (on average 4.022988505747127) internal successors, (350), 87 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:19:07,954 INFO L93 Difference]: Finished difference Result 102346 states and 114342 transitions. [2021-12-07 00:19:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-12-07 00:19:07,954 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.022988505747127) internal successors, (350), 87 states have internal predecessors, (350), 0 states have call successors, (0), 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 238 [2021-12-07 00:19:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:19:08,022 INFO L225 Difference]: With dead ends: 102346 [2021-12-07 00:19:08,022 INFO L226 Difference]: Without dead ends: 97833 [2021-12-07 00:19:08,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 457 SyntacticMatches, 23 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 135711 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=6078, Invalid=328584, Unknown=0, NotChecked=0, Total=334662 [2021-12-07 00:19:08,037 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 2970 mSDsluCounter, 74225 mSDsCounter, 0 mSdLazyCounter, 41797 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 75509 SdHoareTripleChecker+Invalid, 44134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 41797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1828 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:19:08,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 75509 Invalid, 44134 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [509 Valid, 41797 Invalid, 0 Unknown, 1828 Unchecked, 11.7s Time] [2021-12-07 00:19:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97833 states. [2021-12-07 00:19:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97833 to 14925. [2021-12-07 00:19:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14925 states, 14923 states have (on average 1.1250418816591838) internal successors, (16789), 14924 states have internal predecessors, (16789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14925 states to 14925 states and 16789 transitions. [2021-12-07 00:19:08,473 INFO L78 Accepts]: Start accepts. Automaton has 14925 states and 16789 transitions. Word has length 238 [2021-12-07 00:19:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:19:08,473 INFO L470 AbstractCegarLoop]: Abstraction has 14925 states and 16789 transitions. [2021-12-07 00:19:08,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.022988505747127) internal successors, (350), 87 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14925 states and 16789 transitions. [2021-12-07 00:19:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 00:19:08,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:19:08,500 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:19:08,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-07 00:19:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-07 00:19:08,701 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:19:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:19:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash 267523193, now seen corresponding path program 37 times [2021-12-07 00:19:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:19:08,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389055801] [2021-12-07 00:19:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:08,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:19:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 378 proven. 2062 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-07 00:19:09,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:09,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389055801] [2021-12-07 00:19:09,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389055801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:19:09,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251725539] [2021-12-07 00:19:09,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:19:09,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:19:09,394 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:19:09,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-07 00:19:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-07 00:19:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:19:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 435 proven. 2005 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-07 00:19:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:11,496 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 00:19:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 435 proven. 2005 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-07 00:19:11,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251725539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:11,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:19:11,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 82 [2021-12-07 00:19:11,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319169849] [2021-12-07 00:19:11,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-07 00:19:11,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-07 00:19:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=6077, Unknown=0, NotChecked=0, Total=6806 [2021-12-07 00:19:11,599 INFO L87 Difference]: Start difference. First operand 14925 states and 16789 transitions. Second operand has 83 states, 82 states have (on average 4.2926829268292686) internal successors, (352), 83 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:19:15,578 INFO L93 Difference]: Finished difference Result 71836 states and 80911 transitions. [2021-12-07 00:19:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 00:19:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.2926829268292686) internal successors, (352), 83 states have internal predecessors, (352), 0 states have call successors, (0), 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 247 [2021-12-07 00:19:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:19:15,630 INFO L225 Difference]: With dead ends: 71836 [2021-12-07 00:19:15,630 INFO L226 Difference]: Without dead ends: 71836 [2021-12-07 00:19:15,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 449 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3421, Invalid=14669, Unknown=0, NotChecked=0, Total=18090 [2021-12-07 00:19:15,631 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 1138 mSDsluCounter, 4584 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 6186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:19:15,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 4718 Invalid, 6186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 00:19:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71836 states. [2021-12-07 00:19:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71836 to 15055. [2021-12-07 00:19:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15055 states, 15053 states have (on average 1.1256227994419716) internal successors, (16944), 15054 states have internal predecessors, (16944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15055 states to 15055 states and 16944 transitions. [2021-12-07 00:19:16,024 INFO L78 Accepts]: Start accepts. Automaton has 15055 states and 16944 transitions. Word has length 247 [2021-12-07 00:19:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:19:16,024 INFO L470 AbstractCegarLoop]: Abstraction has 15055 states and 16944 transitions. [2021-12-07 00:19:16,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.2926829268292686) internal successors, (352), 83 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 15055 states and 16944 transitions. [2021-12-07 00:19:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-07 00:19:16,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:19:16,030 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:19:16,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-07 00:19:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:16,231 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:19:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:19:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 128895391, now seen corresponding path program 38 times [2021-12-07 00:19:16,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:19:16,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119596353] [2021-12-07 00:19:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:16,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:19:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 227 proven. 2976 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:19:17,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119596353] [2021-12-07 00:19:17,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119596353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:19:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119540218] [2021-12-07 00:19:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:19:17,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:19:17,323 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:19:17,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-07 00:19:17,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:19:17,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:19:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 189 conjunts are in the unsatisfiable core [2021-12-07 00:19:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:19:18,245 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 00:19:22,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:19:22,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:19:22,552 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 00:19:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 66 proven. 2536 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-07 00:19:22,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:23,409 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 13 [2021-12-07 00:19:23,411 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 26 treesize of output 22 [2021-12-07 00:19:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 66 proven. 2536 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-12-07 00:19:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119540218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:24,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:19:24,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 45, 45] total 126 [2021-12-07 00:19:24,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620906358] [2021-12-07 00:19:24,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-07 00:19:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-07 00:19:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=15323, Unknown=0, NotChecked=0, Total=15750 [2021-12-07 00:19:24,915 INFO L87 Difference]: Start difference. First operand 15055 states and 16944 transitions. Second operand has 126 states, 126 states have (on average 4.0) internal successors, (504), 126 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:20:05,028 INFO L93 Difference]: Finished difference Result 119251 states and 133673 transitions. [2021-12-07 00:20:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 546 states. [2021-12-07 00:20:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 4.0) internal successors, (504), 126 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-12-07 00:20:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:20:05,122 INFO L225 Difference]: With dead ends: 119251 [2021-12-07 00:20:05,122 INFO L226 Difference]: Without dead ends: 114514 [2021-12-07 00:20:05,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 457 SyntacticMatches, 15 SemanticMatches, 650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163316 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=7498, Invalid=416954, Unknown=0, NotChecked=0, Total=424452 [2021-12-07 00:20:05,136 INFO L933 BasicCegarLoop]: 1435 mSDtfsCounter, 3826 mSDsluCounter, 101323 mSDsCounter, 0 mSdLazyCounter, 46953 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3826 SdHoareTripleChecker+Valid, 102758 SdHoareTripleChecker+Invalid, 55486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 46953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7916 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:20:05,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3826 Valid, 102758 Invalid, 55486 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [617 Valid, 46953 Invalid, 0 Unknown, 7916 Unchecked, 13.4s Time] [2021-12-07 00:20:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114514 states. [2021-12-07 00:20:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114514 to 17499. [2021-12-07 00:20:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17499 states, 17497 states have (on average 1.130022289535349) internal successors, (19772), 17498 states have internal predecessors, (19772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17499 states to 17499 states and 19772 transitions. [2021-12-07 00:20:05,649 INFO L78 Accepts]: Start accepts. Automaton has 17499 states and 19772 transitions. Word has length 252 [2021-12-07 00:20:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:20:05,649 INFO L470 AbstractCegarLoop]: Abstraction has 17499 states and 19772 transitions. [2021-12-07 00:20:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 4.0) internal successors, (504), 126 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 17499 states and 19772 transitions. [2021-12-07 00:20:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-07 00:20:05,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:20:05,654 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:20:05,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-07 00:20:05,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:05,855 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:20:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:20:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash -961399759, now seen corresponding path program 5 times [2021-12-07 00:20:05,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:20:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378538963] [2021-12-07 00:20:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:05,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:20:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2570 backedges. 276 proven. 2223 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-07 00:20:06,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:20:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378538963] [2021-12-07 00:20:06,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378538963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:20:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947006893] [2021-12-07 00:20:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:20:06,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:20:06,366 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:20:06,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-07 00:20:06,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-07 00:20:06,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:20:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 178 conjunts are in the unsatisfiable core [2021-12-07 00:20:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:20:06,801 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 00:20:06,806 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 00:20:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2570 backedges. 325 proven. 2182 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-07 00:20:08,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:20:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2570 backedges. 378 proven. 2121 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-07 00:20:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947006893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:20:10,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:20:10,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 32] total 99 [2021-12-07 00:20:10,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143571605] [2021-12-07 00:20:10,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:20:10,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-07 00:20:10,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:20:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-07 00:20:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=8903, Unknown=0, NotChecked=0, Total=9900 [2021-12-07 00:20:10,635 INFO L87 Difference]: Start difference. First operand 17499 states and 19772 transitions. Second operand has 100 states, 99 states have (on average 6.03030303030303) internal successors, (597), 100 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:20:14,982 INFO L93 Difference]: Finished difference Result 25573 states and 28316 transitions. [2021-12-07 00:20:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-07 00:20:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 6.03030303030303) internal successors, (597), 100 states have internal predecessors, (597), 0 states have call successors, (0), 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 255 [2021-12-07 00:20:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:20:15,000 INFO L225 Difference]: With dead ends: 25573 [2021-12-07 00:20:15,000 INFO L226 Difference]: Without dead ends: 25573 [2021-12-07 00:20:15,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5332 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4484, Invalid=20322, Unknown=0, NotChecked=0, Total=24806 [2021-12-07 00:20:15,002 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1079 mSDsluCounter, 5519 mSDsCounter, 0 mSdLazyCounter, 5816 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 5666 SdHoareTripleChecker+Invalid, 5979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 5816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:20:15,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 5666 Invalid, 5979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 5816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:20:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25573 states. [2021-12-07 00:20:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25573 to 18508. [2021-12-07 00:20:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18508 states, 18506 states have (on average 1.1312547281962606) internal successors, (20935), 18507 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18508 states to 18508 states and 20935 transitions. [2021-12-07 00:20:15,182 INFO L78 Accepts]: Start accepts. Automaton has 18508 states and 20935 transitions. Word has length 255 [2021-12-07 00:20:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:20:15,182 INFO L470 AbstractCegarLoop]: Abstraction has 18508 states and 20935 transitions. [2021-12-07 00:20:15,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 6.03030303030303) internal successors, (597), 100 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:20:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18508 states and 20935 transitions. [2021-12-07 00:20:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-07 00:20:15,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:20:15,187 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:20:15,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-07 00:20:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:15,388 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-07 00:20:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:20:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash -952977900, now seen corresponding path program 39 times [2021-12-07 00:20:15,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:20:15,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195356446] [2021-12-07 00:20:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:15,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:20:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 435 proven. 2351 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-12-07 00:20:16,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:20:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195356446] [2021-12-07 00:20:16,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195356446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:20:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581786969] [2021-12-07 00:20:16,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:20:16,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:20:16,076 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:20:16,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2df875-37d6-4c49-abb7-ed6d3254dfb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-07 00:20:17,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-07 00:20:17,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:20:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 283 conjunts are in the unsatisfiable core [2021-12-07 00:20:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates...