./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0 --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 e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:19:59,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:19:59,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:20:00,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:20:00,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:20:00,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:20:00,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:20:00,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:20:00,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:20:00,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:20:00,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:20:00,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:20:00,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:20:00,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:20:00,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:20:00,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:20:00,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:20:00,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:20:00,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:20:00,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:20:00,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:20:00,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:20:00,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:20:00,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:20:00,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:20:00,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:20:00,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:20:00,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:20:00,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:20:00,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:20:00,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:20:00,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:20:00,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:20:00,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:20:00,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:20:00,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:20:00,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:20:00,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:20:00,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:20:00,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:20:00,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:20:00,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 16:20:00,167 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:20:00,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:20:00,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:20:00,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:20:00,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:20:00,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:20:00,176 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:20:00,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:20:00,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:20:00,177 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:20:00,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:20:00,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:20:00,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:20:00,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:20:00,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:20:00,179 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:20:00,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:20:00,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:20:00,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:20:00,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:20:00,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:20:00,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:20:00,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:20:00,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:20:00,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:20:00,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:20:00,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:20:00,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:20:00,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:20:00,181 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_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2021-11-22 16:20:00,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:20:00,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:20:00,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:20:00,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:20:00,508 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:20:00,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-11-22 16:20:00,575 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/data/9ea8a2494/49d8ce25f7b94712b01c36aaea480379/FLAG4f4b4f44d [2021-11-22 16:20:01,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:20:01,079 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-11-22 16:20:01,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/data/9ea8a2494/49d8ce25f7b94712b01c36aaea480379/FLAG4f4b4f44d [2021-11-22 16:20:01,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/data/9ea8a2494/49d8ce25f7b94712b01c36aaea480379 [2021-11-22 16:20:01,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:20:01,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:20:01,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:01,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:20:01,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:20:01,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:01,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245549b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01, skipping insertion in model container [2021-11-22 16:20:01,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:01,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:20:01,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:20:01,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:01,892 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:20:01,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:01,991 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:20:01,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01 WrapperNode [2021-11-22 16:20:01,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:01,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:01,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:20:01,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:20:02,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,058 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-11-22 16:20:02,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:02,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:20:02,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:20:02,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:20:02,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:20:02,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:20:02,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:20:02,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:20:02,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (1/1) ... [2021-11-22 16:20:02,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:20:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:02,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:02,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:20:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:20:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:20:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:20:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:20:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:20:02,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:20:02,291 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:20:02,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:20:02,571 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:20:02,577 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:20:02,577 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:20:02,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:02 BoogieIcfgContainer [2021-11-22 16:20:02,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:20:02,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:20:02,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:20:02,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:20:02,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:20:01" (1/3) ... [2021-11-22 16:20:02,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738962b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:20:02, skipping insertion in model container [2021-11-22 16:20:02,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:01" (2/3) ... [2021-11-22 16:20:02,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738962b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:20:02, skipping insertion in model container [2021-11-22 16:20:02,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:02" (3/3) ... [2021-11-22 16:20:02,590 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2021-11-22 16:20:02,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:20:02,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-22 16:20:02,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:20:02,686 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 [2021-11-22 16:20:02,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-22 16:20:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 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) [2021-11-22 16:20:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:02,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:02,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:02,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-22 16:20:02,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195372801] [2021-11-22 16:20:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:02,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195372801] [2021-11-22 16:20:03,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195372801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:03,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391040023] [2021-11-22 16:20:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,149 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 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) 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) [2021-11-22 16:20:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,252 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-22 16:20:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:03,256 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 [2021-11-22 16:20:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,267 INFO L225 Difference]: With dead ends: 100 [2021-11-22 16:20:03,267 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 16:20:03,270 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 [2021-11-22 16:20:03,277 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 16:20:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-11-22 16:20:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 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) [2021-11-22 16:20:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-22 16:20:03,323 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-11-22 16:20:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,323 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-22 16:20:03,323 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) [2021-11-22 16:20:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-22 16:20:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:03,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:20:03,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-22 16:20:03,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761777293] [2021-11-22 16:20:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761777293] [2021-11-22 16:20:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761777293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:03,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691976730] [2021-11-22 16:20:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:20:03,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:03,387 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2021-11-22 16:20:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,433 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-22 16:20:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:03,433 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 [2021-11-22 16:20:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,434 INFO L225 Difference]: With dead ends: 53 [2021-11-22 16:20:03,435 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 16:20:03,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:03,437 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 16:20:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-22 16:20:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 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) [2021-11-22 16:20:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 16:20:03,445 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-11-22 16:20:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,446 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 16:20:03,446 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) [2021-11-22 16:20:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 16:20:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:03,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:20:03,447 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-22 16:20:03,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262547656] [2021-11-22 16:20:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262547656] [2021-11-22 16:20:03,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262547656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77181419] [2021-11-22 16:20:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:03,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,529 INFO L87 Difference]: Start difference. First operand 53 states and 61 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) [2021-11-22 16:20:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,630 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-11-22 16:20:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:03,631 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 [2021-11-22 16:20:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,632 INFO L225 Difference]: With dead ends: 97 [2021-11-22 16:20:03,632 INFO L226 Difference]: Without dead ends: 97 [2021-11-22 16:20:03,633 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 [2021-11-22 16:20:03,634 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-22 16:20:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-11-22 16:20:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 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) [2021-11-22 16:20:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-22 16:20:03,643 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-11-22 16:20:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,643 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-22 16:20:03,643 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) [2021-11-22 16:20:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-22 16:20:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:03,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:20:03,645 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-22 16:20:03,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663754841] [2021-11-22 16:20:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663754841] [2021-11-22 16:20:03,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663754841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735349381] [2021-11-22 16:20:03,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:03,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,756 INFO L87 Difference]: Start difference. First operand 55 states and 64 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) [2021-11-22 16:20:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,806 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-22 16:20:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:03,807 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 [2021-11-22 16:20:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,809 INFO L225 Difference]: With dead ends: 54 [2021-11-22 16:20:03,809 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 16:20:03,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,821 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 16:20:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-22 16:20:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 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) [2021-11-22 16:20:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-22 16:20:03,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-11-22 16:20:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,832 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-22 16:20:03,832 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) [2021-11-22 16:20:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-22 16:20:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:03,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:20:03,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-22 16:20:03,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936451453] [2021-11-22 16:20:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936451453] [2021-11-22 16:20:03,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936451453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:03,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794212148] [2021-11-22 16:20:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:03,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:03,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,899 INFO L87 Difference]: Start difference. First operand 54 states and 63 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) [2021-11-22 16:20:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,939 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-22 16:20:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:03,940 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 [2021-11-22 16:20:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,943 INFO L225 Difference]: With dead ends: 98 [2021-11-22 16:20:03,945 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 16:20:03,946 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 [2021-11-22 16:20:03,947 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 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 [2021-11-22 16:20:03,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 16:20:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-22 16:20:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-22 16:20:03,962 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-11-22 16:20:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,962 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-22 16:20:03,962 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) [2021-11-22 16:20:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-22 16:20:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:03,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:20:03,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-22 16:20:03,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938881285] [2021-11-22 16:20:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938881285] [2021-11-22 16:20:04,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938881285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:04,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004648364] [2021-11-22 16:20:04,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:20:04,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:04,008 INFO L87 Difference]: Start difference. First operand 65 states and 77 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) [2021-11-22 16:20:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,042 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-11-22 16:20:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:04,043 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 [2021-11-22 16:20:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,044 INFO L225 Difference]: With dead ends: 63 [2021-11-22 16:20:04,044 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 16:20:04,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:04,047 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 16:20:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-22 16:20:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-11-22 16:20:04,065 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-11-22 16:20:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,066 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-11-22 16:20:04,066 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) [2021-11-22 16:20:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-11-22 16:20:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:04,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:20:04,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-22 16:20:04,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330648876] [2021-11-22 16:20:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330648876] [2021-11-22 16:20:04,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330648876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:04,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726731487] [2021-11-22 16:20:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:04,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:04,191 INFO L87 Difference]: Start difference. First operand 63 states and 75 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) [2021-11-22 16:20:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,296 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-11-22 16:20:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:04,297 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 [2021-11-22 16:20:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,299 INFO L225 Difference]: With dead ends: 98 [2021-11-22 16:20:04,299 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 16:20:04,300 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 [2021-11-22 16:20:04,302 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 16:20:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-22 16:20:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-22 16:20:04,328 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-11-22 16:20:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,328 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-22 16:20:04,328 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) [2021-11-22 16:20:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-22 16:20:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:20:04,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:20:04,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-22 16:20:04,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208865677] [2021-11-22 16:20:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208865677] [2021-11-22 16:20:04,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208865677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:04,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827283869] [2021-11-22 16:20:04,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:04,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,390 INFO L87 Difference]: Start difference. First operand 65 states and 78 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) [2021-11-22 16:20:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,423 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-22 16:20:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:04,424 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 [2021-11-22 16:20:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,425 INFO L225 Difference]: With dead ends: 64 [2021-11-22 16:20:04,425 INFO L226 Difference]: Without dead ends: 64 [2021-11-22 16:20:04,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,426 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-22 16:20:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-22 16:20:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-22 16:20:04,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-11-22 16:20:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-22 16:20:04,432 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) [2021-11-22 16:20:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-22 16:20:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:20:04,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 16:20:04,434 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-22 16:20:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468462835] [2021-11-22 16:20:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468462835] [2021-11-22 16:20:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468462835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:04,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636581928] [2021-11-22 16:20:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:04,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:04,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:20:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:20:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:04,779 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:20:04,780 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 18 treesize of output 19 [2021-11-22 16:20:04,787 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 13 [2021-11-22 16:20:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636581928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:05,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:05,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-22 16:20:05,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197467172] [2021-11-22 16:20:05,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:20:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:20:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:05,155 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:05,400 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-11-22 16:20:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:20:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 16:20:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:05,402 INFO L225 Difference]: With dead ends: 149 [2021-11-22 16:20:05,402 INFO L226 Difference]: Without dead ends: 149 [2021-11-22 16:20:05,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:20:05,404 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:05,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-22 16:20:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-11-22 16:20:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-22 16:20:05,408 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-11-22 16:20:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-22 16:20:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-22 16:20:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:20:05,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:05,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:05,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:05,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2021-11-22 16:20:05,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143063198] [2021-11-22 16:20:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:05,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143063198] [2021-11-22 16:20:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143063198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:05,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:05,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:05,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714832163] [2021-11-22 16:20:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:05,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:05,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:05,717 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:05,758 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-22 16:20:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 16:20:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:05,759 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:20:05,759 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 16:20:05,759 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 [2021-11-22 16:20:05,760 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:05,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 16:20:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-22 16:20:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 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) [2021-11-22 16:20:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-22 16:20:05,765 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-11-22 16:20:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:05,766 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-22 16:20:05,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-22 16:20:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:20:05,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:05,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:05,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:20:05,772 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2021-11-22 16:20:05,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:05,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614440888] [2021-11-22 16:20:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:05,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614440888] [2021-11-22 16:20:05,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614440888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:05,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:05,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:20:05,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663859287] [2021-11-22 16:20:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:05,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:20:05,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:20:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:20:05,878 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:05,957 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-11-22 16:20:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 16:20:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:05,959 INFO L225 Difference]: With dead ends: 72 [2021-11-22 16:20:05,959 INFO L226 Difference]: Without dead ends: 72 [2021-11-22 16:20:05,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:20:05,960 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:05,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-22 16:20:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-11-22 16:20:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-22 16:20:05,963 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 13 [2021-11-22 16:20:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:05,964 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-22 16:20:05,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-22 16:20:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:20:05,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:05,965 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:05,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:20:05,965 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-22 16:20:05,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389181536] [2021-11-22 16:20:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:05,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389181536] [2021-11-22 16:20:06,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389181536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734246978] [2021-11-22 16:20:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:06,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:06,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:06,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:20:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:20:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:06,133 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:06,134 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 [2021-11-22 16:20:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734246978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:06,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:06,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-22 16:20:06,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808609319] [2021-11-22 16:20:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:06,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:20:06,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:20:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:20:06,454 INFO L87 Difference]: Start difference. First operand 62 states and 75 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) [2021-11-22 16:20:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:06,650 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2021-11-22 16:20:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:20:06,650 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 [2021-11-22 16:20:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:06,651 INFO L225 Difference]: With dead ends: 130 [2021-11-22 16:20:06,651 INFO L226 Difference]: Without dead ends: 130 [2021-11-22 16:20:06,651 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 [2021-11-22 16:20:06,652 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 221 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:06,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 224 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-22 16:20:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-11-22 16:20:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.42) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-11-22 16:20:06,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 13 [2021-11-22 16:20:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:06,655 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-11-22 16:20:06,655 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) [2021-11-22 16:20:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-11-22 16:20:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 16:20:06,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:06,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:06,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:06,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2021-11-22 16:20:06,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:06,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645828014] [2021-11-22 16:20:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:06,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645828014] [2021-11-22 16:20:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645828014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:06,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:06,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:06,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133290559] [2021-11-22 16:20:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:06,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:06,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:07,000 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,031 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-11-22 16:20:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 16:20:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,032 INFO L225 Difference]: With dead ends: 58 [2021-11-22 16:20:07,033 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 16:20:07,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:07,034 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 16:20:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-22 16:20:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 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) [2021-11-22 16:20:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-22 16:20:07,039 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-11-22 16:20:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,041 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-22 16:20:07,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-22 16:20:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 16:20:07,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:20:07,045 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2021-11-22 16:20:07,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271788693] [2021-11-22 16:20:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271788693] [2021-11-22 16:20:07,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271788693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:07,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205726105] [2021-11-22 16:20:07,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:07,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:07,105 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,152 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-22 16:20:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 16:20:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,155 INFO L225 Difference]: With dead ends: 53 [2021-11-22 16:20:07,155 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 16:20:07,155 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 [2021-11-22 16:20:07,156 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 16:20:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-22 16:20:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 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) [2021-11-22 16:20:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 16:20:07,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2021-11-22 16:20:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,160 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 16:20:07,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 16:20:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 16:20:07,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:20:07,163 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2021-11-22 16:20:07,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579020493] [2021-11-22 16:20:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579020493] [2021-11-22 16:20:07,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579020493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:20:07,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67170521] [2021-11-22 16:20:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:20:07,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:20:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:20:07,281 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,351 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-11-22 16:20:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:20:07,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 16:20:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,353 INFO L225 Difference]: With dead ends: 53 [2021-11-22 16:20:07,353 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 16:20:07,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:07,356 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 70 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 16:20:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-22 16:20:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-22 16:20:07,359 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2021-11-22 16:20:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,360 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-22 16:20:07,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-22 16:20:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:20:07,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:20:07,361 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2021-11-22 16:20:07,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809309452] [2021-11-22 16:20:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809309452] [2021-11-22 16:20:07,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809309452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168574383] [2021-11-22 16:20:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:07,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:07,412 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,445 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-11-22 16:20:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 16:20:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,446 INFO L225 Difference]: With dead ends: 52 [2021-11-22 16:20:07,446 INFO L226 Difference]: Without dead ends: 52 [2021-11-22 16:20:07,447 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 [2021-11-22 16:20:07,447 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-22 16:20:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-22 16:20:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 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) [2021-11-22 16:20:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-22 16:20:07,452 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2021-11-22 16:20:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,453 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-22 16:20:07,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-22 16:20:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:20:07,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:20:07,454 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2021-11-22 16:20:07,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503621532] [2021-11-22 16:20:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503621532] [2021-11-22 16:20:07,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503621532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:20:07,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699464171] [2021-11-22 16:20:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:20:07,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:20:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:20:07,555 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,642 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-11-22 16:20:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:20:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 16:20:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,643 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:20:07,643 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 16:20:07,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:20:07,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 69 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 16:20:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-22 16:20:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-22 16:20:07,648 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-11-22 16:20:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,648 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-22 16:20:07,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-22 16:20:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:20:07,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:20:07,650 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2021-11-22 16:20:07,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788487737] [2021-11-22 16:20:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788487737] [2021-11-22 16:20:07,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788487737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:07,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920324452] [2021-11-22 16:20:07,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:07,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:07,684 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,728 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-11-22 16:20:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:20:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 16:20:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,729 INFO L225 Difference]: With dead ends: 52 [2021-11-22 16:20:07,730 INFO L226 Difference]: Without dead ends: 52 [2021-11-22 16:20:07,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:20:07,731 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-22 16:20:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-22 16:20:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 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) [2021-11-22 16:20:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-22 16:20:07,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 19 [2021-11-22 16:20:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,734 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-22 16:20:07,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-22 16:20:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:20:07,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 16:20:07,736 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2021-11-22 16:20:07,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733854611] [2021-11-22 16:20:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733854611] [2021-11-22 16:20:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733854611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 16:20:07,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824528735] [2021-11-22 16:20:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:20:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:20:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:07,843 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,966 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-22 16:20:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:20:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 16:20:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,967 INFO L225 Difference]: With dead ends: 60 [2021-11-22 16:20:07,967 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 16:20:07,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:20:07,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 86 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 16:20:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-11-22 16:20:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-22 16:20:07,969 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-11-22 16:20:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,969 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-22 16:20:07,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-22 16:20:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:20:07,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 16:20:07,971 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2021-11-22 16:20:07,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637227210] [2021-11-22 16:20:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:08,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637227210] [2021-11-22 16:20:08,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637227210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:08,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:08,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 16:20:08,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523681826] [2021-11-22 16:20:08,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:08,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:20:08,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:20:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:20:08,188 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-11-22 16:20:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,322 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-22 16:20:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:20:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 [2021-11-22 16:20:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,323 INFO L225 Difference]: With dead ends: 68 [2021-11-22 16:20:08,323 INFO L226 Difference]: Without dead ends: 46 [2021-11-22 16:20:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:20:08,324 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-22 16:20:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-22 16:20:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 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) [2021-11-22 16:20:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-22 16:20:08,327 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2021-11-22 16:20:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,327 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-22 16:20:08,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-11-22 16:20:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-22 16:20:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:20:08,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:08,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 16:20:08,328 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1530543595, now seen corresponding path program 1 times [2021-11-22 16:20:08,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910779126] [2021-11-22 16:20:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:08,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910779126] [2021-11-22 16:20:08,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910779126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:08,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:08,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:20:08,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595598447] [2021-11-22 16:20:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:08,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:20:08,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:20:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:08,511 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,651 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-11-22 16:20:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:20:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 16:20:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,652 INFO L225 Difference]: With dead ends: 71 [2021-11-22 16:20:08,652 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 16:20:08,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:20:08,652 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 136 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 16:20:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-11-22 16:20:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 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) [2021-11-22 16:20:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-22 16:20:08,654 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2021-11-22 16:20:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,655 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-22 16:20:08,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-22 16:20:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 16:20:08,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:08,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 16:20:08,656 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1247746578, now seen corresponding path program 1 times [2021-11-22 16:20:08,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534765196] [2021-11-22 16:20:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534765196] [2021-11-22 16:20:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534765196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220602933] [2021-11-22 16:20:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:08,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:20:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 16:20:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:08,853 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:20:08,854 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 18 treesize of output 19 [2021-11-22 16:20:08,859 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 13 [2021-11-22 16:20:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220602933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:09,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:09,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-11-22 16:20:09,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949178121] [2021-11-22 16:20:09,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:09,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 16:20:09,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 16:20:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:20:09,327 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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) [2021-11-22 16:20:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:09,666 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-11-22 16:20:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:20:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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 [2021-11-22 16:20:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:09,670 INFO L225 Difference]: With dead ends: 65 [2021-11-22 16:20:09,670 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 16:20:09,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-11-22 16:20:09,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:09,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 155 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 16:20:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-11-22 16:20:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 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) [2021-11-22 16:20:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-11-22 16:20:09,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2021-11-22 16:20:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:09,674 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-11-22 16:20:09,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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) [2021-11-22 16:20:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-11-22 16:20:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:20:09,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:09,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:09,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:09,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-22 16:20:09,885 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash -788585585, now seen corresponding path program 1 times [2021-11-22 16:20:09,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:09,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212115849] [2021-11-22 16:20:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:09,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:10,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212115849] [2021-11-22 16:20:10,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212115849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:10,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:10,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 16:20:10,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140251488] [2021-11-22 16:20:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:10,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:20:10,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:20:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:20:10,080 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) 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) [2021-11-22 16:20:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:10,311 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-11-22 16:20:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:20:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) 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 27 [2021-11-22 16:20:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:10,312 INFO L225 Difference]: With dead ends: 61 [2021-11-22 16:20:10,313 INFO L226 Difference]: Without dead ends: 43 [2021-11-22 16:20:10,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:20:10,314 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:10,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 230 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-22 16:20:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-22 16:20:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-22 16:20:10,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2021-11-22 16:20:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:10,316 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-22 16:20:10,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) 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) [2021-11-22 16:20:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-22 16:20:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:20:10,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:10,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:10,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 16:20:10,317 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -922599091, now seen corresponding path program 1 times [2021-11-22 16:20:10,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806559113] [2021-11-22 16:20:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:10,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:10,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806559113] [2021-11-22 16:20:10,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806559113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:10,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:10,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-22 16:20:10,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080012403] [2021-11-22 16:20:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:10,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:20:10,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:20:10,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:20:10,606 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-11-22 16:20:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:10,990 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-22 16:20:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:20:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 16:20:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:10,992 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:20:10,992 INFO L226 Difference]: Without dead ends: 47 [2021-11-22 16:20:10,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:20:10,993 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:10,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 179 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-22 16:20:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-22 16:20:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-11-22 16:20:10,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2021-11-22 16:20:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:10,995 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-11-22 16:20:10,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-11-22 16:20:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-11-22 16:20:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 16:20:10,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:10,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:10,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 16:20:10,996 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 904511312, now seen corresponding path program 1 times [2021-11-22 16:20:10,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:10,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032770122] [2021-11-22 16:20:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:10,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:11,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032770122] [2021-11-22 16:20:11,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032770122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808151199] [2021-11-22 16:20:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:11,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:11,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:20:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:11,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 16:20:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:11,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:11,567 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 [2021-11-22 16:20:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:11,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808151199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:11,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:11,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-11-22 16:20:11,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477080715] [2021-11-22 16:20:11,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:11,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 16:20:11,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 16:20:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:20:11,608 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:11,886 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-22 16:20:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:20:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 16:20:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:11,887 INFO L225 Difference]: With dead ends: 50 [2021-11-22 16:20:11,887 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 16:20:11,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-11-22 16:20:11,888 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:11,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 184 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 16:20:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-22 16:20:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-22 16:20:11,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2021-11-22 16:20:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:11,891 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-22 16:20:11,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-22 16:20:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:20:11,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:11,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:11,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:12,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-22 16:20:12,105 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1651977841, now seen corresponding path program 1 times [2021-11-22 16:20:12,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:12,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758822232] [2021-11-22 16:20:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:12,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:20:12,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758822232] [2021-11-22 16:20:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758822232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402087925] [2021-11-22 16:20:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:12,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:12,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:12,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:12,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:20:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 16:20:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:12,292 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:20:12,292 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 18 treesize of output 19 [2021-11-22 16:20:12,298 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 13 [2021-11-22 16:20:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:12,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402087925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:12,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:12,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2021-11-22 16:20:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705759598] [2021-11-22 16:20:12,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:12,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:20:12,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:20:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:20:12,859 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:13,184 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-22 16:20:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:20:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 16:20:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:13,186 INFO L225 Difference]: With dead ends: 52 [2021-11-22 16:20:13,186 INFO L226 Difference]: Without dead ends: 52 [2021-11-22 16:20:13,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-11-22 16:20:13,187 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:13,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 137 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-22 16:20:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-11-22 16:20:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 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) [2021-11-22 16:20:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-22 16:20:13,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2021-11-22 16:20:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:13,190 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-22 16:20:13,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-22 16:20:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:20:13,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:13,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:13,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:13,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-22 16:20:13,394 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1587501230, now seen corresponding path program 1 times [2021-11-22 16:20:13,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041164937] [2021-11-22 16:20:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:13,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:13,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041164937] [2021-11-22 16:20:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041164937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:13,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104576857] [2021-11-22 16:20:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:13,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:13,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:13,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:13,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:20:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-22 16:20:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:13,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:14,103 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 [2021-11-22 16:20:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104576857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:14,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:14,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-11-22 16:20:14,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220987916] [2021-11-22 16:20:14,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:14,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:20:14,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:20:14,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:20:14,145 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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) [2021-11-22 16:20:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:14,415 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-11-22 16:20:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:20:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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) Word has length 35 [2021-11-22 16:20:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:14,416 INFO L225 Difference]: With dead ends: 59 [2021-11-22 16:20:14,416 INFO L226 Difference]: Without dead ends: 56 [2021-11-22 16:20:14,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:20:14,418 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 195 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:14,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 172 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-22 16:20:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-22 16:20:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-22 16:20:14,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2021-11-22 16:20:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:14,420 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-22 16:20:14,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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) [2021-11-22 16:20:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-22 16:20:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 16:20:14,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:14,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:14,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 16:20:14,622 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -579332495, now seen corresponding path program 1 times [2021-11-22 16:20:14,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:14,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522254590] [2021-11-22 16:20:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:14,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:14,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522254590] [2021-11-22 16:20:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522254590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956682007] [2021-11-22 16:20:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:14,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:20:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 16:20:14,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:15,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:20:15,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:20:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:15,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:25,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:25,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-11-22 16:20:25,756 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 40 treesize of output 36 [2021-11-22 16:20:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-22 16:20:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:25,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956682007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:25,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:25,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 36 [2021-11-22 16:20:25,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840604110] [2021-11-22 16:20:25,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:25,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 16:20:25,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 16:20:25,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1135, Unknown=11, NotChecked=0, Total=1260 [2021-11-22 16:20:25,932 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:26,771 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-11-22 16:20:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 16:20:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-22 16:20:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:26,772 INFO L225 Difference]: With dead ends: 123 [2021-11-22 16:20:26,772 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 16:20:26,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=308, Invalid=2761, Unknown=11, NotChecked=0, Total=3080 [2021-11-22 16:20:26,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:26,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 413 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 275 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2021-11-22 16:20:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 16:20:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-22 16:20:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 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) [2021-11-22 16:20:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-22 16:20:26,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2021-11-22 16:20:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:26,779 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-22 16:20:26,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-22 16:20:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 16:20:26,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:26,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:26,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:26,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 16:20:26,981 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash -491067849, now seen corresponding path program 2 times [2021-11-22 16:20:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:26,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705667297] [2021-11-22 16:20:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:26,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:27,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705667297] [2021-11-22 16:20:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705667297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220961911] [2021-11-22 16:20:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:27,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:27,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:27,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:20:27,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:20:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-22 16:20:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:27,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:27,680 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 [2021-11-22 16:20:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:27,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220961911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:27,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:27,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-22 16:20:27,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858422594] [2021-11-22 16:20:27,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:27,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 16:20:27,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 16:20:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:20:27,744 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 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) [2021-11-22 16:20:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:28,044 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-11-22 16:20:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:20:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-22 16:20:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:28,045 INFO L225 Difference]: With dead ends: 67 [2021-11-22 16:20:28,045 INFO L226 Difference]: Without dead ends: 67 [2021-11-22 16:20:28,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:20:28,046 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:28,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 200 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-22 16:20:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-11-22 16:20:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 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) [2021-11-22 16:20:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-11-22 16:20:28,050 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2021-11-22 16:20:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:28,050 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-11-22 16:20:28,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 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) [2021-11-22 16:20:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-11-22 16:20:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 16:20:28,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:28,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:28,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:28,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 16:20:28,261 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 530199960, now seen corresponding path program 2 times [2021-11-22 16:20:28,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584140734] [2021-11-22 16:20:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:28,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:28,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584140734] [2021-11-22 16:20:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584140734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166171924] [2021-11-22 16:20:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:28,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:28,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:20:28,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:20:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 16:20:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:28,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:29,020 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 [2021-11-22 16:20:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166171924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:29,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-11-22 16:20:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537252138] [2021-11-22 16:20:29,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 16:20:29,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 16:20:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-22 16:20:29,080 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:29,440 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-22 16:20:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:20:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-22 16:20:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:29,441 INFO L225 Difference]: With dead ends: 62 [2021-11-22 16:20:29,441 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 16:20:29,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-11-22 16:20:29,443 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 281 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:29,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 207 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 16:20:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-22 16:20:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 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) [2021-11-22 16:20:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-11-22 16:20:29,445 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2021-11-22 16:20:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:29,446 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-11-22 16:20:29,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-11-22 16:20:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:20:29,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:29,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:29,656 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1243825766, now seen corresponding path program 2 times [2021-11-22 16:20:29,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:29,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981103782] [2021-11-22 16:20:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:29,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:29,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981103782] [2021-11-22 16:20:29,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981103782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:29,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412717839] [2021-11-22 16:20:29,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:29,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:29,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:29,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:20:29,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 16:20:29,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:29,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:20:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-22 16:20:30,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:20:30,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412717839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:30,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:20:30,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2021-11-22 16:20:30,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826976519] [2021-11-22 16:20:30,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:30,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:30,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:20:30,073 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:30,128 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-22 16:20:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:20:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:20:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:30,130 INFO L225 Difference]: With dead ends: 60 [2021-11-22 16:20:30,130 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 16:20:30,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:20:30,131 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:30,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 16:20:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-22 16:20:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 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) [2021-11-22 16:20:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-22 16:20:30,133 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-11-22 16:20:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:30,133 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-22 16:20:30,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-22 16:20:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:20:30,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:30,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:30,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:30,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:30,353 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1019693383, now seen corresponding path program 3 times [2021-11-22 16:20:30,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:30,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465432267] [2021-11-22 16:20:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:30,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:30,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465432267] [2021-11-22 16:20:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465432267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405848250] [2021-11-22 16:20:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:20:30,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:30,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:30,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:20:30,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 16:20:30,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-22 16:20:30,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:30,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:30,788 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 [2021-11-22 16:20:31,669 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 [2021-11-22 16:20:32,261 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:20:32,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-11-22 16:20:32,828 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-22 16:20:32,828 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 34 treesize of output 19 [2021-11-22 16:20:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:33,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:33,574 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 103 treesize of output 103 [2021-11-22 16:20:33,613 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 40 treesize of output 36 [2021-11-22 16:20:33,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:33,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2021-11-22 16:20:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:34,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405848250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:34,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:34,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 25, 20] total 51 [2021-11-22 16:20:34,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186263632] [2021-11-22 16:20:34,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:34,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-22 16:20:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-22 16:20:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2021-11-22 16:20:34,298 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:38,543 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-11-22 16:20:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-22 16:20:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 16:20:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:38,544 INFO L225 Difference]: With dead ends: 161 [2021-11-22 16:20:38,544 INFO L226 Difference]: Without dead ends: 68 [2021-11-22 16:20:38,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=835, Invalid=8095, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:20:38,548 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:38,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 521 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 976 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2021-11-22 16:20:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-22 16:20:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-11-22 16:20:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 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) [2021-11-22 16:20:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-11-22 16:20:38,551 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2021-11-22 16:20:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-11-22 16:20:38,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-11-22 16:20:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 16:20:38,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:38,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:38,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:38,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-22 16:20:38,761 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2077042049, now seen corresponding path program 4 times [2021-11-22 16:20:38,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:38,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774715691] [2021-11-22 16:20:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:38,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:38,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774715691] [2021-11-22 16:20:38,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774715691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933206460] [2021-11-22 16:20:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:20:38,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:38,949 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:38,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:20:39,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:20:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 16:20:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:39,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:39,553 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 [2021-11-22 16:20:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:39,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933206460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:39,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:39,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-22 16:20:39,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749998704] [2021-11-22 16:20:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:39,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 16:20:39,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 16:20:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:20:39,630 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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) [2021-11-22 16:20:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:39,916 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-22 16:20:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:20:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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 61 [2021-11-22 16:20:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:39,917 INFO L225 Difference]: With dead ends: 75 [2021-11-22 16:20:39,917 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 16:20:39,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 16:20:39,919 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 358 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 198 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 16:20:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-11-22 16:20:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-22 16:20:39,922 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2021-11-22 16:20:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:39,922 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-22 16:20:39,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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) [2021-11-22 16:20:39,922 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-22 16:20:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:20:39,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:39,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:39,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-22 16:20:40,143 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1122383840, now seen corresponding path program 3 times [2021-11-22 16:20:40,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113438762] [2021-11-22 16:20:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:40,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:40,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:40,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113438762] [2021-11-22 16:20:40,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113438762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:40,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330385693] [2021-11-22 16:20:40,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:20:40,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:40,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:40,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:40,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 16:20:40,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 16:20:40,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 16:20:40,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:40,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:41,148 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 7 treesize of output 5 [2021-11-22 16:20:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330385693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:41,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-11-22 16:20:41,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972699439] [2021-11-22 16:20:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:41,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 16:20:41,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 16:20:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-11-22 16:20:41,209 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 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) [2021-11-22 16:20:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:41,652 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-11-22 16:20:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 16:20:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 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 63 [2021-11-22 16:20:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:41,654 INFO L225 Difference]: With dead ends: 74 [2021-11-22 16:20:41,654 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 16:20:41,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 16:20:41,655 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 204 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:41,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 298 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 16:20:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-22 16:20:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-22 16:20:41,659 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2021-11-22 16:20:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:41,659 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-22 16:20:41,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 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) [2021-11-22 16:20:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-22 16:20:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 16:20:41,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:41,660 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:41,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:41,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-22 16:20:41,877 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -356785407, now seen corresponding path program 5 times [2021-11-22 16:20:41,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:41,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203654992] [2021-11-22 16:20:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:41,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:42,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203654992] [2021-11-22 16:20:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203654992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176072837] [2021-11-22 16:20:42,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:20:42,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:42,202 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:42,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 16:20:42,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-22 16:20:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-22 16:20:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:42,679 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 [2021-11-22 16:20:43,028 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 28 treesize of output 24 [2021-11-22 16:20:43,108 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:20:43,109 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 42 treesize of output 41 [2021-11-22 16:20:44,319 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-22 16:20:44,320 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 49 treesize of output 32 [2021-11-22 16:20:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:44,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:45,095 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 [2021-11-22 16:20:45,108 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 [2021-11-22 16:20:45,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:20:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:20:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176072837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:45,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:45,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2021-11-22 16:20:45,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891004189] [2021-11-22 16:20:45,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:45,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 16:20:45,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 16:20:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 16:20:45,631 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:46,272 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2021-11-22 16:20:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:20:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-22 16:20:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:46,274 INFO L225 Difference]: With dead ends: 134 [2021-11-22 16:20:46,274 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 16:20:46,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=290, Invalid=2680, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 16:20:46,275 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:46,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 682 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2021-11-22 16:20:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 16:20:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-22 16:20:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-11-22 16:20:46,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 69 [2021-11-22 16:20:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:46,279 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-11-22 16:20:46,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-11-22 16:20:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 16:20:46,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:46,280 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:46,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:46,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:46,485 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1038706139, now seen corresponding path program 4 times [2021-11-22 16:20:46,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:46,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869636652] [2021-11-22 16:20:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:46,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:47,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869636652] [2021-11-22 16:20:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869636652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752444312] [2021-11-22 16:20:47,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:20:47,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:47,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:47,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 16:20:47,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:20:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-22 16:20:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:47,549 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 21 treesize of output 17 [2021-11-22 16:20:49,093 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-22 16:20:49,093 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 46 treesize of output 30 [2021-11-22 16:20:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:20:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:54,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncmp_#t~post9#1.offset_72| Int) (|ULTIMATE.start_cstrncmp_~s1#1.base| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_cstrncmp_~s1#1.base|) (+ 3 |v_ULTIMATE.start_cstrncmp_#t~post9#1.offset_72|)))) (or (= .cse0 0) (not (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncmp_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncmp_~s2#1.offset|))))))) is different from false [2021-11-22 16:20:57,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:57,083 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 109 treesize of output 109 [2021-11-22 16:20:57,113 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 40 treesize of output 36 [2021-11-22 16:20:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 28 trivial. 3 not checked. [2021-11-22 16:20:57,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752444312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:57,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:57,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 23] total 61 [2021-11-22 16:20:57,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103831843] [2021-11-22 16:20:57,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-22 16:20:57,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-22 16:20:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3310, Unknown=5, NotChecked=116, Total=3660 [2021-11-22 16:20:57,739 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 61 states, 61 states have (on average 2.8524590163934427) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:58,754 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-11-22 16:20:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:20:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.8524590163934427) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 16:20:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:58,756 INFO L225 Difference]: With dead ends: 127 [2021-11-22 16:20:58,756 INFO L226 Difference]: Without dead ends: 93 [2021-11-22 16:20:58,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=413, Invalid=4842, Unknown=5, NotChecked=142, Total=5402 [2021-11-22 16:20:58,759 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 147 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:58,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 909 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 768 Invalid, 0 Unknown, 566 Unchecked, 0.4s Time] [2021-11-22 16:20:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-22 16:20:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-11-22 16:20:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-11-22 16:20:58,762 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 75 [2021-11-22 16:20:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:58,763 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-11-22 16:20:58,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.8524590163934427) internal successors, (174), 61 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-11-22 16:20:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 16:20:58,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:58,764 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:58,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:58,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:58,981 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1978254888, now seen corresponding path program 5 times [2021-11-22 16:20:58,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:58,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893199635] [2021-11-22 16:20:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:58,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:20:59,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:59,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893199635] [2021-11-22 16:20:59,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893199635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:59,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713601600] [2021-11-22 16:20:59,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:20:59,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:59,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:59,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 16:20:59,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-22 16:20:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-22 16:20:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:59,463 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:59,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 16:21:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 16:21:00,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:00,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713601600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:00,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:00,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 42 [2021-11-22 16:21:00,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671041629] [2021-11-22 16:21:00,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-22 16:21:00,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-22 16:21:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 16:21:00,877 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:01,704 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-11-22 16:21:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 16:21:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 16:21:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:01,706 INFO L225 Difference]: With dead ends: 90 [2021-11-22 16:21:01,706 INFO L226 Difference]: Without dead ends: 90 [2021-11-22 16:21:01,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=522, Invalid=2670, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 16:21:01,709 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 311 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:01,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 386 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:21:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-22 16:21:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-22 16:21:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-11-22 16:21:01,712 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2021-11-22 16:21:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:01,712 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-11-22 16:21:01,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-11-22 16:21:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 16:21:01,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:01,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:01,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:01,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:01,933 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 622697289, now seen corresponding path program 6 times [2021-11-22 16:21:01,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:01,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247371077] [2021-11-22 16:21:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:01,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:02,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247371077] [2021-11-22 16:21:02,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247371077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532752783] [2021-11-22 16:21:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:21:02,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:02,389 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:02,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 16:21:02,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 16:21:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-22 16:21:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:02,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 16:21:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:21:03,173 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:21:03,173 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 35 treesize of output 34 [2021-11-22 16:21:04,396 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:21:04,396 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 38 treesize of output 23 [2021-11-22 16:21:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:04,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:05,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-11-22 16:21:05,129 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 [2021-11-22 16:21:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:05,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532752783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:05,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:05,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2021-11-22 16:21:05,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332783927] [2021-11-22 16:21:05,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:05,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-22 16:21:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-22 16:21:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1597, Unknown=1, NotChecked=80, Total=1806 [2021-11-22 16:21:05,454 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:08,762 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2021-11-22 16:21:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 16:21:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 16:21:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:08,763 INFO L225 Difference]: With dead ends: 156 [2021-11-22 16:21:08,763 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 16:21:08,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=195, Invalid=2356, Unknown=3, NotChecked=98, Total=2652 [2021-11-22 16:21:08,764 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:08,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 852 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 404 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2021-11-22 16:21:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 16:21:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-22 16:21:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 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) [2021-11-22 16:21:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-11-22 16:21:08,768 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 85 [2021-11-22 16:21:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:08,768 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-11-22 16:21:08,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-11-22 16:21:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 16:21:08,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:08,770 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:08,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:08,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 16:21:08,977 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 224549964, now seen corresponding path program 7 times [2021-11-22 16:21:08,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:08,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114479418] [2021-11-22 16:21:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:08,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:09,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114479418] [2021-11-22 16:21:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114479418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856087454] [2021-11-22 16:21:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:21:09,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:09,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:09,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 16:21:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-22 16:21:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:09,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:10,208 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 [2021-11-22 16:21:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:21:10,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856087454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:10,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:10,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-11-22 16:21:10,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108029659] [2021-11-22 16:21:10,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:10,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 16:21:10,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 16:21:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 16:21:10,316 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:10,810 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-11-22 16:21:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 16:21:10,810 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 16:21:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:10,811 INFO L225 Difference]: With dead ends: 103 [2021-11-22 16:21:10,812 INFO L226 Difference]: Without dead ends: 103 [2021-11-22 16:21:10,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 16:21:10,813 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 490 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:10,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 411 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:21:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-22 16:21:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-11-22 16:21:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-11-22 16:21:10,816 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2021-11-22 16:21:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:10,817 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-11-22 16:21:10,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-11-22 16:21:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-22 16:21:10,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:10,818 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:10,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:11,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-22 16:21:11,044 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1044150893, now seen corresponding path program 6 times [2021-11-22 16:21:11,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:11,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767584499] [2021-11-22 16:21:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:11,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:11,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:11,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767584499] [2021-11-22 16:21:11,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767584499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500427155] [2021-11-22 16:21:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:21:11,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:11,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:11,946 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:11,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 16:21:12,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 16:21:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-22 16:21:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:12,552 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 [2021-11-22 16:21:13,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:21:13,219 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 26 treesize of output 10 [2021-11-22 16:21:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:13,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:34,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:21:34,532 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 103 treesize of output 103 [2021-11-22 16:21:34,546 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 40 treesize of output 36 [2021-11-22 16:21:34,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-22 16:21:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:34,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500427155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:34,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:34,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 24] total 66 [2021-11-22 16:21:34,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068314212] [2021-11-22 16:21:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:34,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-22 16:21:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-22 16:21:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4020, Unknown=31, NotChecked=0, Total=4290 [2021-11-22 16:21:34,955 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 66 states, 66 states have (on average 3.1818181818181817) internal successors, (210), 66 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:36,933 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-11-22 16:21:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 16:21:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1818181818181817) internal successors, (210), 66 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-22 16:21:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:36,934 INFO L225 Difference]: With dead ends: 151 [2021-11-22 16:21:36,934 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 16:21:36,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=611, Invalid=6840, Unknown=31, NotChecked=0, Total=7482 [2021-11-22 16:21:36,936 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 265 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:36,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1065 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1447 Invalid, 0 Unknown, 546 Unchecked, 0.8s Time] [2021-11-22 16:21:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 16:21:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-11-22 16:21:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-11-22 16:21:36,940 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 91 [2021-11-22 16:21:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:36,940 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-11-22 16:21:36,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1818181818181817) internal successors, (210), 66 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-11-22 16:21:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 16:21:36,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:36,942 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:36,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:37,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-22 16:21:37,146 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 180412528, now seen corresponding path program 7 times [2021-11-22 16:21:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464195952] [2021-11-22 16:21:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:37,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:37,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:37,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464195952] [2021-11-22 16:21:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464195952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:37,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411820774] [2021-11-22 16:21:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:21:37,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:37,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:37,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 16:21:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-22 16:21:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:37,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:38,364 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 [2021-11-22 16:21:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411820774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:38,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:38,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2021-11-22 16:21:38,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991764718] [2021-11-22 16:21:38,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:38,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 16:21:38,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 16:21:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 16:21:38,445 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:39,160 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-11-22 16:21:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:21:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-22 16:21:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:39,161 INFO L225 Difference]: With dead ends: 106 [2021-11-22 16:21:39,161 INFO L226 Difference]: Without dead ends: 106 [2021-11-22 16:21:39,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=1979, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 16:21:39,162 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 294 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:39,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 464 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:21:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-22 16:21:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-22 16:21:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-11-22 16:21:39,166 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2021-11-22 16:21:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:39,166 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-11-22 16:21:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-11-22 16:21:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 16:21:39,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:39,168 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:39,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:39,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:39,373 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1082531951, now seen corresponding path program 8 times [2021-11-22 16:21:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:39,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977644482] [2021-11-22 16:21:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:39,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:39,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:39,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977644482] [2021-11-22 16:21:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977644482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:39,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315042246] [2021-11-22 16:21:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:21:39,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:39,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:39,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 16:21:39,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:21:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-22 16:21:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:40,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:21:41,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:21:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:41,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:44,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:21:44,374 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 103 treesize of output 103 [2021-11-22 16:21:44,434 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 40 treesize of output 36 [2021-11-22 16:21:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 16:21:44,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315042246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:44,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:44,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 27] total 55 [2021-11-22 16:21:44,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682721488] [2021-11-22 16:21:44,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:44,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 16:21:44,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 16:21:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2822, Unknown=1, NotChecked=0, Total=2970 [2021-11-22 16:21:44,679 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:46,739 INFO L93 Difference]: Finished difference Result 294 states and 299 transitions. [2021-11-22 16:21:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-22 16:21:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-22 16:21:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:46,740 INFO L225 Difference]: With dead ends: 294 [2021-11-22 16:21:46,741 INFO L226 Difference]: Without dead ends: 119 [2021-11-22 16:21:46,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=445, Invalid=8296, Unknown=1, NotChecked=0, Total=8742 [2021-11-22 16:21:46,742 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 167 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:46,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1435 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 998 Invalid, 0 Unknown, 522 Unchecked, 0.4s Time] [2021-11-22 16:21:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-22 16:21:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2021-11-22 16:21:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-11-22 16:21:46,745 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 101 [2021-11-22 16:21:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:46,746 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-11-22 16:21:46,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-11-22 16:21:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-22 16:21:46,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:46,747 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:46,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:46,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-22 16:21:46,957 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 705298263, now seen corresponding path program 9 times [2021-11-22 16:21:46,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:46,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213061523] [2021-11-22 16:21:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:46,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:47,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213061523] [2021-11-22 16:21:47,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213061523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106665445] [2021-11-22 16:21:47,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:21:47,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:47,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:47,278 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:47,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 16:21:47,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-22 16:21:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 16:21:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:47,674 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:21:47,675 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 18 treesize of output 19 [2021-11-22 16:21:47,678 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 13 [2021-11-22 16:21:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:48,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 66 proven. 126 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106665445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:49,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2021-11-22 16:21:49,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684129898] [2021-11-22 16:21:49,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:49,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-22 16:21:49,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-22 16:21:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 16:21:49,425 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:50,538 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-11-22 16:21:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 16:21:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-22 16:21:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:50,540 INFO L225 Difference]: With dead ends: 123 [2021-11-22 16:21:50,540 INFO L226 Difference]: Without dead ends: 123 [2021-11-22 16:21:50,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=942, Invalid=3750, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 16:21:50,541 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 544 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:50,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 387 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:21:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-22 16:21:50,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-11-22 16:21:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-11-22 16:21:50,546 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2021-11-22 16:21:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-11-22 16:21:50,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-11-22 16:21:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 16:21:50,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:50,548 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:50,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:50,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-22 16:21:50,752 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash -813201736, now seen corresponding path program 8 times [2021-11-22 16:21:50,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:50,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888886457] [2021-11-22 16:21:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:50,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:51,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888886457] [2021-11-22 16:21:51,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888886457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003013594] [2021-11-22 16:21:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:21:51,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:51,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:51,131 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:51,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 16:21:51,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:21:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-22 16:21:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:51,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:52,345 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 [2021-11-22 16:21:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:52,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003013594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:52,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:52,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2021-11-22 16:21:52,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649933644] [2021-11-22 16:21:52,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:52,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-22 16:21:52,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:52,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-22 16:21:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 16:21:52,446 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:53,117 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-11-22 16:21:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 16:21:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 16:21:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:53,118 INFO L225 Difference]: With dead ends: 122 [2021-11-22 16:21:53,118 INFO L226 Difference]: Without dead ends: 122 [2021-11-22 16:21:53,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2021-11-22 16:21:53,119 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 699 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:53,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 517 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:21:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-22 16:21:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-22 16:21:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 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) [2021-11-22 16:21:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-11-22 16:21:53,122 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2021-11-22 16:21:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:53,123 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-11-22 16:21:53,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-11-22 16:21:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-22 16:21:53,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:53,125 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:53,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-22 16:21:53,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:53,341 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2098417703, now seen corresponding path program 10 times [2021-11-22 16:21:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:53,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323462939] [2021-11-22 16:21:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:53,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:53,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323462939] [2021-11-22 16:21:53,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323462939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070718458] [2021-11-22 16:21:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:21:53,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:53,849 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:53,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 16:21:54,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:21:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-22 16:21:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:54,084 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 [2021-11-22 16:21:54,913 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 21 treesize of output 17 [2021-11-22 16:21:54,985 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 31 treesize of output 30 [2021-11-22 16:21:56,892 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-22 16:21:56,893 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 36 treesize of output 23 [2021-11-22 16:21:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:56,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:57,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-11-22 16:21:57,795 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 [2021-11-22 16:21:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070718458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:58,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:58,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 59 [2021-11-22 16:21:58,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207591819] [2021-11-22 16:21:58,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:58,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-22 16:21:58,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-22 16:21:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3127, Unknown=1, NotChecked=112, Total=3422 [2021-11-22 16:21:58,234 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:58,666 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2021-11-22 16:21:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-22 16:21:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:21:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:58,667 INFO L225 Difference]: With dead ends: 212 [2021-11-22 16:21:58,667 INFO L226 Difference]: Without dead ends: 128 [2021-11-22 16:21:58,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=234, Invalid=3929, Unknown=1, NotChecked=126, Total=4290 [2021-11-22 16:21:58,668 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:58,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1080 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 520 Invalid, 0 Unknown, 260 Unchecked, 0.2s Time] [2021-11-22 16:21:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-22 16:21:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2021-11-22 16:21:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-11-22 16:21:58,672 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2021-11-22 16:21:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:58,673 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-11-22 16:21:58,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-11-22 16:21:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-22 16:21:58,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:58,675 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:58,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:58,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:58,889 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2037687516, now seen corresponding path program 11 times [2021-11-22 16:21:58,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662697990] [2021-11-22 16:21:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:58,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:21:59,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:59,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662697990] [2021-11-22 16:21:59,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662697990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:59,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490791315] [2021-11-22 16:21:59,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:21:59,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:59,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:59,239 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:59,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 16:22:00,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-22 16:22:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-22 16:22:00,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:00,383 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 [2021-11-22 16:22:00,388 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 [2021-11-22 16:22:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:22:01,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 91 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 16:22:02,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490791315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:02,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:02,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 51 [2021-11-22 16:22:02,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250630201] [2021-11-22 16:22:02,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:02,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-22 16:22:02,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-22 16:22:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2021-11-22 16:22:02,478 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 52 states, 51 states have (on average 5.764705882352941) internal successors, (294), 52 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:03,258 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-11-22 16:22:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 16:22:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.764705882352941) internal successors, (294), 52 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-22 16:22:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:03,260 INFO L225 Difference]: With dead ends: 135 [2021-11-22 16:22:03,260 INFO L226 Difference]: Without dead ends: 135 [2021-11-22 16:22:03,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=685, Invalid=3347, Unknown=0, NotChecked=0, Total=4032 [2021-11-22 16:22:03,261 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 482 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:03,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 667 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:22:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-22 16:22:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2021-11-22 16:22:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-11-22 16:22:03,265 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 121 [2021-11-22 16:22:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:03,265 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-11-22 16:22:03,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.764705882352941) internal successors, (294), 52 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-11-22 16:22:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-22 16:22:03,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:03,267 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:03,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:03,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-22 16:22:03,481 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash -287383811, now seen corresponding path program 9 times [2021-11-22 16:22:03,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944925060] [2021-11-22 16:22:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:03,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:04,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944925060] [2021-11-22 16:22:04,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944925060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555787905] [2021-11-22 16:22:04,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:22:04,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:04,581 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:04,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-22 16:22:04,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 16:22:04,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-22 16:22:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:05,448 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 21 treesize of output 17 [2021-11-22 16:22:06,397 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 16:22:06,397 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 26 treesize of output 10 [2021-11-22 16:22:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:06,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:07,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:22:07,438 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 103 treesize of output 103 [2021-11-22 16:22:07,496 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 40 treesize of output 36 [2021-11-22 16:22:07,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:22:07,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2021-11-22 16:22:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555787905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:08,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 30] total 88 [2021-11-22 16:22:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253537276] [2021-11-22 16:22:08,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-22 16:22:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-22 16:22:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=7327, Unknown=0, NotChecked=0, Total=7656 [2021-11-22 16:22:08,105 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 88 states, 88 states have (on average 3.409090909090909) internal successors, (300), 88 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:11,553 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2021-11-22 16:22:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 16:22:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.409090909090909) internal successors, (300), 88 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-22 16:22:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:11,555 INFO L225 Difference]: With dead ends: 199 [2021-11-22 16:22:11,555 INFO L226 Difference]: Without dead ends: 141 [2021-11-22 16:22:11,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=997, Invalid=13765, Unknown=0, NotChecked=0, Total=14762 [2021-11-22 16:22:11,556 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 589 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 3934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:11,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1783 Invalid, 3934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3593 Invalid, 0 Unknown, 172 Unchecked, 1.5s Time] [2021-11-22 16:22:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-22 16:22:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2021-11-22 16:22:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-11-22 16:22:11,560 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 123 [2021-11-22 16:22:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:11,560 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-11-22 16:22:11,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.409090909090909) internal successors, (300), 88 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-11-22 16:22:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-22 16:22:11,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:11,562 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:11,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:11,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-22 16:22:11,773 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 240761088, now seen corresponding path program 10 times [2021-11-22 16:22:11,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:11,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419700641] [2021-11-22 16:22:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:11,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:12,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419700641] [2021-11-22 16:22:12,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419700641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415720222] [2021-11-22 16:22:12,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:22:12,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:12,173 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:12,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-22 16:22:12,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:22:12,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-22 16:22:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:12,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:13,438 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 [2021-11-22 16:22:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:13,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415720222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:13,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:13,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2021-11-22 16:22:13,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928994212] [2021-11-22 16:22:13,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 16:22:13,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 16:22:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 16:22:13,539 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 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) [2021-11-22 16:22:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:14,376 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-11-22 16:22:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:22:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 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 127 [2021-11-22 16:22:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:14,377 INFO L225 Difference]: With dead ends: 138 [2021-11-22 16:22:14,378 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 16:22:14,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2021-11-22 16:22:14,379 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 438 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:14,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 715 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:22:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 16:22:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-22 16:22:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 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) [2021-11-22 16:22:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-11-22 16:22:14,383 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2021-11-22 16:22:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:14,383 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-11-22 16:22:14,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 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) [2021-11-22 16:22:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-11-22 16:22:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 16:22:14,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:14,384 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:14,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-22 16:22:14,597 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:14,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1265497055, now seen corresponding path program 12 times [2021-11-22 16:22:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330667684] [2021-11-22 16:22:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:14,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:15,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330667684] [2021-11-22 16:22:15,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330667684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036820688] [2021-11-22 16:22:15,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:22:15,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:15,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:15,150 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:15,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-22 16:22:15,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 16:22:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-22 16:22:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:16,995 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 21 treesize of output 17 [2021-11-22 16:22:17,073 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-11-22 16:22:17,073 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 36 treesize of output 35 [2021-11-22 16:22:17,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:22:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:17,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:18,015 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 [2021-11-22 16:22:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036820688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:19,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:19,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34, 34] total 77 [2021-11-22 16:22:19,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418862564] [2021-11-22 16:22:19,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:19,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-22 16:22:19,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:19,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-22 16:22:19,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5485, Unknown=0, NotChecked=0, Total=5852 [2021-11-22 16:22:19,738 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 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) [2021-11-22 16:22:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:24,391 INFO L93 Difference]: Finished difference Result 313 states and 316 transitions. [2021-11-22 16:22:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-22 16:22:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 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) Word has length 133 [2021-11-22 16:22:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:24,393 INFO L225 Difference]: With dead ends: 313 [2021-11-22 16:22:24,393 INFO L226 Difference]: Without dead ends: 144 [2021-11-22 16:22:24,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1467, Invalid=14535, Unknown=0, NotChecked=0, Total=16002 [2021-11-22 16:22:24,395 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 867 mSDsluCounter, 2278 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 3966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:24,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 2330 Invalid, 3966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 3765 Invalid, 0 Unknown, 47 Unchecked, 1.6s Time] [2021-11-22 16:22:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-22 16:22:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-11-22 16:22:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-11-22 16:22:24,399 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 133 [2021-11-22 16:22:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-11-22 16:22:24,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 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) [2021-11-22 16:22:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-11-22 16:22:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-22 16:22:24,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:24,401 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:24,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:24,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-22 16:22:24,605 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1083022116, now seen corresponding path program 13 times [2021-11-22 16:22:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272929021] [2021-11-22 16:22:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:24,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:25,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:25,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272929021] [2021-11-22 16:22:25,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272929021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:25,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672270693] [2021-11-22 16:22:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:22:25,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:25,025 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:25,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-22 16:22:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-22 16:22:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:25,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:26,574 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 [2021-11-22 16:22:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 16:22:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672270693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:26,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:26,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2021-11-22 16:22:26,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143189521] [2021-11-22 16:22:26,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:26,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-22 16:22:26,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-22 16:22:26,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 16:22:26,713 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:27,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:27,526 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-11-22 16:22:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 16:22:27,527 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-22 16:22:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:27,527 INFO L225 Difference]: With dead ends: 151 [2021-11-22 16:22:27,528 INFO L226 Difference]: Without dead ends: 151 [2021-11-22 16:22:27,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=616, Invalid=2690, Unknown=0, NotChecked=0, Total=3306 [2021-11-22 16:22:27,528 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 602 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:27,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 822 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:22:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-22 16:22:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-11-22 16:22:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 146 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2021-11-22 16:22:27,532 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2021-11-22 16:22:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2021-11-22 16:22:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2021-11-22 16:22:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-22 16:22:27,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:27,534 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:27,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:27,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-22 16:22:27,747 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1402168133, now seen corresponding path program 11 times [2021-11-22 16:22:27,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048150368] [2021-11-22 16:22:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:27,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:28,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048150368] [2021-11-22 16:22:28,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048150368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115565999] [2021-11-22 16:22:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:22:28,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:28,857 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:28,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-22 16:22:30,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-22 16:22:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 178 conjunts are in the unsatisfiable core [2021-11-22 16:22:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:30,466 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:22:30,467 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 [2021-11-22 16:22:31,688 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 [2021-11-22 16:22:33,211 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 34 treesize of output 28 [2021-11-22 16:22:33,451 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-22 16:22:33,451 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 39 treesize of output 24 [2021-11-22 16:22:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:22:33,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:36,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:22:36,223 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 111 treesize of output 111 [2021-11-22 16:22:36,276 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 34 treesize of output 32 [2021-11-22 16:22:36,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-22 16:22:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 301 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:38,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115565999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:38,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:38,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 35] total 107 [2021-11-22 16:22:38,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858534280] [2021-11-22 16:22:38,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:38,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-22 16:22:38,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-22 16:22:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=10743, Unknown=0, NotChecked=0, Total=11342 [2021-11-22 16:22:38,141 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 107 states, 107 states have (on average 3.439252336448598) internal successors, (368), 107 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:44,458 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2021-11-22 16:22:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-22 16:22:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.439252336448598) internal successors, (368), 107 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-22 16:22:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:44,460 INFO L225 Difference]: With dead ends: 223 [2021-11-22 16:22:44,460 INFO L226 Difference]: Without dead ends: 157 [2021-11-22 16:22:44,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 216 SyntacticMatches, 23 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5548 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1791, Invalid=19089, Unknown=0, NotChecked=0, Total=20880 [2021-11-22 16:22:44,462 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 777 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 4210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:44,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 2106 Invalid, 4210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3107 Invalid, 0 Unknown, 931 Unchecked, 1.4s Time] [2021-11-22 16:22:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-22 16:22:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2021-11-22 16:22:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-11-22 16:22:44,466 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 139 [2021-11-22 16:22:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:44,466 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-11-22 16:22:44,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.439252336448598) internal successors, (368), 107 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-11-22 16:22:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-22 16:22:44,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:44,468 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:44,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:44,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-22 16:22:44,675 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1923909816, now seen corresponding path program 12 times [2021-11-22 16:22:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170336932] [2021-11-22 16:22:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:44,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 66 proven. 302 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:45,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170336932] [2021-11-22 16:22:45,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170336932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956984871] [2021-11-22 16:22:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:22:45,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:45,151 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:45,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-22 16:22:46,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 16:22:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:46,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-22 16:22:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:46,448 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:22:46,448 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 [2021-11-22 16:22:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:47,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 120 proven. 248 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956984871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:48,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:48,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2021-11-22 16:22:48,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057622524] [2021-11-22 16:22:48,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:48,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-22 16:22:48,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-22 16:22:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=3719, Unknown=0, NotChecked=0, Total=4290 [2021-11-22 16:22:48,954 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 66 states, 65 states have (on average 5.184615384615385) internal successors, (337), 66 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:50,126 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-11-22 16:22:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 16:22:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 5.184615384615385) internal successors, (337), 66 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-22 16:22:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:50,128 INFO L225 Difference]: With dead ends: 154 [2021-11-22 16:22:50,128 INFO L226 Difference]: Without dead ends: 154 [2021-11-22 16:22:50,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1470, Invalid=5840, Unknown=0, NotChecked=0, Total=7310 [2021-11-22 16:22:50,129 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 461 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:50,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 633 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:22:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-22 16:22:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-22 16:22:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 152 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-22 16:22:50,133 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 143 [2021-11-22 16:22:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:50,134 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-22 16:22:50,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 5.184615384615385) internal successors, (337), 66 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-22 16:22:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-22 16:22:50,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:50,135 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:50,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:50,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-22 16:22:50,345 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:22:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 361100393, now seen corresponding path program 14 times [2021-11-22 16:22:50,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935166997] [2021-11-22 16:22:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:50,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:50,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935166997] [2021-11-22 16:22:50,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935166997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751234276] [2021-11-22 16:22:50,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:22:50,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:50,943 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:50,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-22 16:22:51,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:22:51,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:22:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-22 16:22:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:51,721 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 21 treesize of output 17 [2021-11-22 16:22:53,164 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 [2021-11-22 16:22:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:53,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:56,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:22:56,690 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 103 treesize of output 103 [2021-11-22 16:22:56,735 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 40 treesize of output 36 [2021-11-22 16:22:56,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:22:56,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2021-11-22 16:22:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-22 16:22:57,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751234276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:57,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:57,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 36] total 82 [2021-11-22 16:22:57,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388561220] [2021-11-22 16:22:57,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:57,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-22 16:22:57,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-22 16:22:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6393, Unknown=1, NotChecked=0, Total=6642 [2021-11-22 16:22:57,514 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 82 states, 82 states have (on average 4.2073170731707314) internal successors, (345), 82 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:01,541 INFO L93 Difference]: Finished difference Result 426 states and 431 transitions. [2021-11-22 16:23:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-22 16:23:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.2073170731707314) internal successors, (345), 82 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:23:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:01,543 INFO L225 Difference]: With dead ends: 426 [2021-11-22 16:23:01,543 INFO L226 Difference]: Without dead ends: 167 [2021-11-22 16:23:01,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=732, Invalid=17627, Unknown=1, NotChecked=0, Total=18360 [2021-11-22 16:23:01,544 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 298 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 3402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:01,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 2420 Invalid, 3402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2882 Invalid, 0 Unknown, 457 Unchecked, 1.1s Time] [2021-11-22 16:23:01,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-22 16:23:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2021-11-22 16:23:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2021-11-22 16:23:01,548 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 149 [2021-11-22 16:23:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:01,548 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2021-11-22 16:23:01,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.2073170731707314) internal successors, (345), 82 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2021-11-22 16:23:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-22 16:23:01,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:01,550 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:01,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:01,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:01,773 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 324276271, now seen corresponding path program 15 times [2021-11-22 16:23:01,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201360489] [2021-11-22 16:23:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:01,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:02,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201360489] [2021-11-22 16:23:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201360489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957676819] [2021-11-22 16:23:02,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:23:02,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:02,237 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-22 16:23:03,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-22 16:23:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-22 16:23:03,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:03,738 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:23:03,738 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 [2021-11-22 16:23:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:06,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 153 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:10,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957676819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:10,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:10,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36, 35] total 92 [2021-11-22 16:23:10,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36728068] [2021-11-22 16:23:10,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:10,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-22 16:23:10,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-22 16:23:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=7499, Unknown=0, NotChecked=0, Total=8556 [2021-11-22 16:23:10,106 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 93 states, 92 states have (on average 4.684782608695652) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:14,778 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2021-11-22 16:23:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-22 16:23:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.684782608695652) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-22 16:23:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:14,780 INFO L225 Difference]: With dead ends: 269 [2021-11-22 16:23:14,780 INFO L226 Difference]: Without dead ends: 269 [2021-11-22 16:23:14,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 252 SyntacticMatches, 15 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4868 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3877, Invalid=16145, Unknown=0, NotChecked=0, Total=20022 [2021-11-22 16:23:14,782 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2621 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2621 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:14,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2621 Valid, 1293 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 2432 Invalid, 0 Unknown, 244 Unchecked, 1.4s Time] [2021-11-22 16:23:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-22 16:23:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2021-11-22 16:23:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 166 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-11-22 16:23:14,787 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 157 [2021-11-22 16:23:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-11-22 16:23:14,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.684782608695652) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-11-22 16:23:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-22 16:23:14,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:14,789 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:14,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:14,993 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1903115888, now seen corresponding path program 13 times [2021-11-22 16:23:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330889465] [2021-11-22 16:23:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 91 proven. 377 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:15,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330889465] [2021-11-22 16:23:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330889465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079320158] [2021-11-22 16:23:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:23:15,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:15,533 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:15,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-22 16:23:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-22 16:23:15,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:16,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:16,981 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 [2021-11-22 16:23:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079320158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:17,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 51 [2021-11-22 16:23:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777889739] [2021-11-22 16:23:17,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:17,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-22 16:23:17,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-22 16:23:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-11-22 16:23:17,106 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:18,323 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-11-22 16:23:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 16:23:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-22 16:23:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:18,324 INFO L225 Difference]: With dead ends: 170 [2021-11-22 16:23:18,325 INFO L226 Difference]: Without dead ends: 170 [2021-11-22 16:23:18,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1027, Invalid=4375, Unknown=0, NotChecked=0, Total=5402 [2021-11-22 16:23:18,326 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 686 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1050 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:23:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-22 16:23:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-11-22 16:23:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2021-11-22 16:23:18,330 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2021-11-22 16:23:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:18,330 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2021-11-22 16:23:18,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2021-11-22 16:23:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-22 16:23:18,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:18,332 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:18,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-22 16:23:18,553 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -488347471, now seen corresponding path program 16 times [2021-11-22 16:23:18,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324819019] [2021-11-22 16:23:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:18,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:19,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324819019] [2021-11-22 16:23:19,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324819019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975449867] [2021-11-22 16:23:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:23:19,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:19,257 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:19,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-22 16:23:19,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:23:19,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-22 16:23:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:19,584 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 [2021-11-22 16:23:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:23:20,558 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:23:20,559 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 35 treesize of output 34 [2021-11-22 16:23:24,369 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:23:24,369 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 49 treesize of output 34 [2021-11-22 16:23:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:24,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:25,836 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 62 treesize of output 56 [2021-11-22 16:23:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975449867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:27,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:27,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 70 [2021-11-22 16:23:27,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43128514] [2021-11-22 16:23:27,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:27,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-22 16:23:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-22 16:23:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4618, Unknown=1, NotChecked=0, Total=4830 [2021-11-22 16:23:27,147 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 70 states, 70 states have (on average 4.442857142857143) internal successors, (311), 70 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:28,190 INFO L93 Difference]: Finished difference Result 296 states and 299 transitions. [2021-11-22 16:23:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 16:23:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.442857142857143) internal successors, (311), 70 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:23:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:28,191 INFO L225 Difference]: With dead ends: 296 [2021-11-22 16:23:28,192 INFO L226 Difference]: Without dead ends: 176 [2021-11-22 16:23:28,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=314, Invalid=6491, Unknown=1, NotChecked=0, Total=6806 [2021-11-22 16:23:28,193 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 65 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:28,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2258 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1046 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2021-11-22 16:23:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-22 16:23:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2021-11-22 16:23:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-11-22 16:23:28,201 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 165 [2021-11-22 16:23:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:28,201 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-11-22 16:23:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.442857142857143) internal successors, (311), 70 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-11-22 16:23:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-22 16:23:28,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:28,203 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:28,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:28,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-22 16:23:28,425 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1100272716, now seen corresponding path program 17 times [2021-11-22 16:23:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736841608] [2021-11-22 16:23:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:28,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 120 proven. 440 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:28,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736841608] [2021-11-22 16:23:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736841608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4242651] [2021-11-22 16:23:28,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:23:28,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:28,963 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:28,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-22 16:23:30,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-22 16:23:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-22 16:23:30,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:32,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:23:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-22 16:23:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4242651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:33,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:33,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 63 [2021-11-22 16:23:33,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777316017] [2021-11-22 16:23:33,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-22 16:23:33,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-22 16:23:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-11-22 16:23:33,519 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 64 states, 63 states have (on average 5.26984126984127) internal successors, (332), 64 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:35,152 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2021-11-22 16:23:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:23:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 5.26984126984127) internal successors, (332), 64 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:23:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:35,154 INFO L225 Difference]: With dead ends: 183 [2021-11-22 16:23:35,154 INFO L226 Difference]: Without dead ends: 183 [2021-11-22 16:23:35,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1620, Invalid=6570, Unknown=0, NotChecked=0, Total=8190 [2021-11-22 16:23:35,155 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 841 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:35,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 988 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:23:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-22 16:23:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-11-22 16:23:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 178 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-11-22 16:23:35,160 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 169 [2021-11-22 16:23:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:35,160 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-11-22 16:23:35,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 5.26984126984127) internal successors, (332), 64 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-11-22 16:23:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-22 16:23:35,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:35,162 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:35,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:35,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:35,368 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -800124971, now seen corresponding path program 14 times [2021-11-22 16:23:35,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746371397] [2021-11-22 16:23:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:35,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:36,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746371397] [2021-11-22 16:23:36,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746371397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96466073] [2021-11-22 16:23:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:23:36,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:36,918 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:36,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-22 16:23:37,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:23:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 221 conjunts are in the unsatisfiable core [2021-11-22 16:23:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:38,283 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 21 treesize of output 17 [2021-11-22 16:23:41,580 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-22 16:23:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-11-22 16:23:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 684 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:23:41,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:43,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:23:43,723 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 109 treesize of output 109 [2021-11-22 16:23:43,745 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 40 treesize of output 36 [2021-11-22 16:23:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 495 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:23:45,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96466073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:45,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:45,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 118 [2021-11-22 16:23:45,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763211139] [2021-11-22 16:23:45,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:45,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-22 16:23:45,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-22 16:23:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=13362, Unknown=0, NotChecked=0, Total=13806 [2021-11-22 16:23:45,169 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 118 states, 118 states have (on average 3.8220338983050848) internal successors, (451), 118 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:48,852 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2021-11-22 16:23:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-22 16:23:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.8220338983050848) internal successors, (451), 118 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-11-22 16:23:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:48,854 INFO L225 Difference]: With dead ends: 271 [2021-11-22 16:23:48,854 INFO L226 Difference]: Without dead ends: 189 [2021-11-22 16:23:48,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5027 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=752, Invalid=19270, Unknown=0, NotChecked=0, Total=20022 [2021-11-22 16:23:48,855 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 233 mSDsluCounter, 4368 mSDsCounter, 0 mSdLazyCounter, 4238 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 4432 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1191 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:48,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 4432 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4238 Invalid, 0 Unknown, 1191 Unchecked, 1.7s Time] [2021-11-22 16:23:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-22 16:23:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 183. [2021-11-22 16:23:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-11-22 16:23:48,859 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 171 [2021-11-22 16:23:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-11-22 16:23:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.8220338983050848) internal successors, (451), 118 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-11-22 16:23:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-22 16:23:48,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:48,862 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:48,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:49,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:49,073 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -802318376, now seen corresponding path program 15 times [2021-11-22 16:23:49,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:49,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468848607] [2021-11-22 16:23:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:49,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 120 proven. 460 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:23:49,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468848607] [2021-11-22 16:23:49,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468848607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857733862] [2021-11-22 16:23:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:23:49,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:49,646 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:49,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-22 16:23:52,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 16:23:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-22 16:23:52,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:52,627 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:23:52,628 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 [2021-11-22 16:23:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 427 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:23:54,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 190 proven. 390 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:23:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857733862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:55,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2021-11-22 16:23:55,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773974606] [2021-11-22 16:23:55,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:55,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-22 16:23:55,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-22 16:23:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-11-22 16:23:55,899 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 78 states, 77 states have (on average 5.311688311688312) internal successors, (409), 78 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:57,541 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2021-11-22 16:23:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-22 16:23:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 5.311688311688312) internal successors, (409), 78 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-22 16:23:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:57,542 INFO L225 Difference]: With dead ends: 186 [2021-11-22 16:23:57,543 INFO L226 Difference]: Without dead ends: 186 [2021-11-22 16:23:57,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2072, Invalid=8230, Unknown=0, NotChecked=0, Total=10302 [2021-11-22 16:23:57,544 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 624 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:57,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1040 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:23:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-22 16:23:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-22 16:23:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 184 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2021-11-22 16:23:57,549 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 175 [2021-11-22 16:23:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2021-11-22 16:23:57,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 5.311688311688312) internal successors, (409), 78 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2021-11-22 16:23:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-22 16:23:57,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:57,551 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:57,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:57,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:57,758 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash -708220679, now seen corresponding path program 18 times [2021-11-22 16:23:57,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780719445] [2021-11-22 16:23:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:57,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:23:58,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780719445] [2021-11-22 16:23:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780719445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159057127] [2021-11-22 16:23:58,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:23:58,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:58,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:58,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-22 16:24:02,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-22 16:24:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:24:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-22 16:24:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:24:02,045 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 [2021-11-22 16:24:02,853 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 21 treesize of output 17 [2021-11-22 16:24:02,921 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:24:02,921 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 35 treesize of output 34 [2021-11-22 16:24:05,311 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:24:05,311 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 38 treesize of output 23 [2021-11-22 16:24:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:24:05,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:24:14,296 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 [2021-11-22 16:24:14,298 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 [2021-11-22 16:24:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:24:15,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159057127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:24:15,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:24:15,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29] total 71 [2021-11-22 16:24:15,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789664543] [2021-11-22 16:24:15,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:24:15,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-22 16:24:15,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:24:15,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-22 16:24:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2021-11-22 16:24:15,126 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 71 states, 71 states have (on average 4.76056338028169) internal successors, (338), 71 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:24:16,223 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2021-11-22 16:24:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 16:24:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.76056338028169) internal successors, (338), 71 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-22 16:24:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:24:16,225 INFO L225 Difference]: With dead ends: 324 [2021-11-22 16:24:16,225 INFO L226 Difference]: Without dead ends: 192 [2021-11-22 16:24:16,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=315, Invalid=6825, Unknown=0, NotChecked=0, Total=7140 [2021-11-22 16:24:16,226 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:24:16,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2718 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1132 Invalid, 0 Unknown, 341 Unchecked, 0.4s Time] [2021-11-22 16:24:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-22 16:24:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2021-11-22 16:24:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2021-11-22 16:24:16,230 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 181 [2021-11-22 16:24:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:24:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2021-11-22 16:24:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.76056338028169) internal successors, (338), 71 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2021-11-22 16:24:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-22 16:24:16,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:24:16,232 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:24:16,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-22 16:24:16,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:16,445 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:24:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:24:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 996656636, now seen corresponding path program 19 times [2021-11-22 16:24:16,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:24:16,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481363368] [2021-11-22 16:24:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:24:16,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:24:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 153 proven. 529 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:24:17,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:24:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481363368] [2021-11-22 16:24:17,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481363368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:24:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365344192] [2021-11-22 16:24:17,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:24:17,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:17,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:24:17,086 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:24:17,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-22 16:24:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-22 16:24:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:24:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:24:18,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:24:18,864 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 [2021-11-22 16:24:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 16:24:19,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365344192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:24:19,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:24:19,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-11-22 16:24:19,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706885266] [2021-11-22 16:24:19,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:24:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-22 16:24:19,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:24:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-22 16:24:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 16:24:19,042 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:24:20,131 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2021-11-22 16:24:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:24:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-22 16:24:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:24:20,132 INFO L225 Difference]: With dead ends: 199 [2021-11-22 16:24:20,132 INFO L226 Difference]: Without dead ends: 199 [2021-11-22 16:24:20,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=964, Invalid=4292, Unknown=0, NotChecked=0, Total=5256 [2021-11-22 16:24:20,133 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 562 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:24:20,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1139 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:24:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-22 16:24:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-11-22 16:24:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 194 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2021-11-22 16:24:20,138 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2021-11-22 16:24:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:24:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2021-11-22 16:24:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2021-11-22 16:24:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-22 16:24:20,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:24:20,140 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:24:20,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-22 16:24:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:20,356 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:24:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:24:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 9320477, now seen corresponding path program 16 times [2021-11-22 16:24:20,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:24:20,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971260768] [2021-11-22 16:24:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:24:20,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:24:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:24:22,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:24:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971260768] [2021-11-22 16:24:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971260768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:24:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535659792] [2021-11-22 16:24:22,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:24:22,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:24:22,250 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:24:22,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-22 16:24:22,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:24:22,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:24:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 241 conjunts are in the unsatisfiable core [2021-11-22 16:24:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:24:23,748 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 21 treesize of output 17 [2021-11-22 16:24:24,297 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 [2021-11-22 16:24:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 840 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:24:24,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:24:26,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:24:26,373 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 103 treesize of output 103 [2021-11-22 16:24:26,424 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 40 treesize of output 36 [2021-11-22 16:24:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 610 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535659792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:24:26,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:24:26,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 100 [2021-11-22 16:24:26,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568008819] [2021-11-22 16:24:26,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:24:26,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-22 16:24:26,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:24:26,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-22 16:24:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=9598, Unknown=0, NotChecked=0, Total=9900 [2021-11-22 16:24:26,800 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 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) [2021-11-22 16:24:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:24:32,780 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2021-11-22 16:24:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-22 16:24:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 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 187 [2021-11-22 16:24:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:24:32,782 INFO L225 Difference]: With dead ends: 295 [2021-11-22 16:24:32,782 INFO L226 Difference]: Without dead ends: 205 [2021-11-22 16:24:32,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3546 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=940, Invalid=18800, Unknown=0, NotChecked=0, Total=19740 [2021-11-22 16:24:32,784 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 551 mSDsluCounter, 3980 mSDsCounter, 0 mSdLazyCounter, 7642 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 4050 SdHoareTripleChecker+Invalid, 7871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 7642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:24:32,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 4050 Invalid, 7871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 7642 Invalid, 0 Unknown, 120 Unchecked, 3.0s Time] [2021-11-22 16:24:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-22 16:24:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-11-22 16:24:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 198 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-11-22 16:24:32,788 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 187 [2021-11-22 16:24:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:24:32,788 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-11-22 16:24:32,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.79) internal successors, (379), 100 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) [2021-11-22 16:24:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-11-22 16:24:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-22 16:24:32,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:24:32,790 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:24:32,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-22 16:24:33,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:33,005 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:24:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:24:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1941571040, now seen corresponding path program 17 times [2021-11-22 16:24:33,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:24:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574980899] [2021-11-22 16:24:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:24:33,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:24:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 153 proven. 551 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:33,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:24:33,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574980899] [2021-11-22 16:24:33,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574980899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:24:33,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216782564] [2021-11-22 16:24:33,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:24:33,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:24:33,671 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:24:33,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-22 16:24:36,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-22 16:24:36,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:24:36,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-22 16:24:36,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:24:36,954 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:24:36,954 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 [2021-11-22 16:24:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 190 proven. 514 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:38,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:24:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 231 proven. 473 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:40,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216782564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:24:40,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:24:40,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2021-11-22 16:24:40,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872206627] [2021-11-22 16:24:40,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:24:40,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-22 16:24:40,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:24:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-22 16:24:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=6162, Unknown=0, NotChecked=0, Total=6972 [2021-11-22 16:24:40,774 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 84 states, 83 states have (on average 5.36144578313253) internal successors, (445), 84 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:24:42,330 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2021-11-22 16:24:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 16:24:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 5.36144578313253) internal successors, (445), 84 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:24:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:24:42,332 INFO L225 Difference]: With dead ends: 202 [2021-11-22 16:24:42,332 INFO L226 Difference]: Without dead ends: 202 [2021-11-22 16:24:42,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2134, Invalid=9856, Unknown=0, NotChecked=0, Total=11990 [2021-11-22 16:24:42,333 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 813 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:24:42,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 1296 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 16:24:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-22 16:24:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-22 16:24:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.020100502512563) internal successors, (203), 200 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) [2021-11-22 16:24:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2021-11-22 16:24:42,336 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 191 [2021-11-22 16:24:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:24:42,337 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2021-11-22 16:24:42,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 5.36144578313253) internal successors, (445), 84 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2021-11-22 16:24:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-22 16:24:42,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:24:42,339 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:24:42,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-22 16:24:42,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:42,546 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:24:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:24:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 592508225, now seen corresponding path program 20 times [2021-11-22 16:24:42,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:24:42,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391906532] [2021-11-22 16:24:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:24:42,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:24:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:43,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:24:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391906532] [2021-11-22 16:24:43,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391906532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:24:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197115120] [2021-11-22 16:24:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:24:43,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:24:43,486 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:24:43,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-22 16:24:43,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:24:43,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:24:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 231 conjunts are in the unsatisfiable core [2021-11-22 16:24:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:24:44,288 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 21 treesize of output 17 [2021-11-22 16:24:46,382 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 [2021-11-22 16:24:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:46,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:24:50,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:24:50,873 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 103 treesize of output 103 [2021-11-22 16:24:50,940 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 40 treesize of output 36 [2021-11-22 16:24:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 16:24:51,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197115120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:24:51,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:24:51,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 45] total 90 [2021-11-22 16:24:51,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764732796] [2021-11-22 16:24:51,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:24:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-22 16:24:51,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:24:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-22 16:24:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=7769, Unknown=1, NotChecked=0, Total=8010 [2021-11-22 16:24:51,321 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 90 states, 90 states have (on average 4.5) internal successors, (405), 90 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:24:57,326 INFO L93 Difference]: Finished difference Result 558 states and 563 transitions. [2021-11-22 16:24:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-22 16:24:57,326 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.5) internal successors, (405), 90 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-22 16:24:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:24:57,328 INFO L225 Difference]: With dead ends: 558 [2021-11-22 16:24:57,328 INFO L226 Difference]: Without dead ends: 215 [2021-11-22 16:24:57,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=736, Invalid=24069, Unknown=1, NotChecked=0, Total=24806 [2021-11-22 16:24:57,329 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 283 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 4227 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 4426 SdHoareTripleChecker+Invalid, 5193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:24:57,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 4426 Invalid, 5193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4227 Invalid, 0 Unknown, 916 Unchecked, 1.8s Time] [2021-11-22 16:24:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-22 16:24:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 209. [2021-11-22 16:24:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2021-11-22 16:24:57,334 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 197 [2021-11-22 16:24:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:24:57,334 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2021-11-22 16:24:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.5) internal successors, (405), 90 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:24:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2021-11-22 16:24:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-22 16:24:57,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:24:57,336 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:24:57,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-22 16:24:57,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:57,549 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:24:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:24:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash -435876601, now seen corresponding path program 21 times [2021-11-22 16:24:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:24:57,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434025130] [2021-11-22 16:24:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:24:57,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:24:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:24:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 190 proven. 626 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:24:58,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:24:58,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434025130] [2021-11-22 16:24:58,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434025130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:24:58,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795878223] [2021-11-22 16:24:58,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:24:58,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:24:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:24:58,245 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:24:58,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-22 16:25:04,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-22 16:25:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-22 16:25:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:06,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:07,291 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 [2021-11-22 16:25:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795878223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:08,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:08,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 72 [2021-11-22 16:25:08,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275628516] [2021-11-22 16:25:08,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:08,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-22 16:25:08,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-22 16:25:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=4557, Unknown=0, NotChecked=0, Total=5256 [2021-11-22 16:25:08,114 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 73 states, 72 states have (on average 5.861111111111111) internal successors, (422), 73 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:09,892 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-11-22 16:25:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-22 16:25:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 5.861111111111111) internal successors, (422), 73 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-22 16:25:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:09,894 INFO L225 Difference]: With dead ends: 219 [2021-11-22 16:25:09,894 INFO L226 Difference]: Without dead ends: 219 [2021-11-22 16:25:09,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2029, Invalid=8071, Unknown=0, NotChecked=0, Total=10100 [2021-11-22 16:25:09,897 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1149 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:09,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 1062 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:25:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-22 16:25:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2021-11-22 16:25:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-11-22 16:25:09,902 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 205 [2021-11-22 16:25:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:09,902 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-11-22 16:25:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 5.861111111111111) internal successors, (422), 73 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-11-22 16:25:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-22 16:25:09,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:09,904 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:09,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-22 16:25:10,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-22 16:25:10,112 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2029381736, now seen corresponding path program 18 times [2021-11-22 16:25:10,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:10,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988596422] [2021-11-22 16:25:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:10,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 190 proven. 650 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:10,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988596422] [2021-11-22 16:25:10,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988596422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627265645] [2021-11-22 16:25:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:25:10,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:10,799 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:10,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-22 16:25:18,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-22 16:25:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-22 16:25:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:18,808 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:25:18,808 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 [2021-11-22 16:25:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 231 proven. 609 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:20,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 276 proven. 564 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627265645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:22,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 89 [2021-11-22 16:25:22,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511430354] [2021-11-22 16:25:22,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-22 16:25:22,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-22 16:25:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1067, Invalid=6943, Unknown=0, NotChecked=0, Total=8010 [2021-11-22 16:25:22,658 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:24,653 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-11-22 16:25:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-22 16:25:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-22 16:25:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:24,654 INFO L225 Difference]: With dead ends: 218 [2021-11-22 16:25:24,654 INFO L226 Difference]: Without dead ends: 218 [2021-11-22 16:25:24,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2778, Invalid=11028, Unknown=0, NotChecked=0, Total=13806 [2021-11-22 16:25:24,655 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1340 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:24,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 1362 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:25:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-22 16:25:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-22 16:25:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 216 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) [2021-11-22 16:25:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-11-22 16:25:24,660 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2021-11-22 16:25:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:24,660 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-11-22 16:25:24,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-11-22 16:25:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-22 16:25:24,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:24,662 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:24,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:24,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:24,871 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2090274185, now seen corresponding path program 22 times [2021-11-22 16:25:24,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:24,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99507629] [2021-11-22 16:25:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:24,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:25,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:25,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99507629] [2021-11-22 16:25:25,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99507629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:25,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397895981] [2021-11-22 16:25:25,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:25:25,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:25,705 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:25,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-22 16:25:26,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:25:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-22 16:25:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:26,222 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:25:26,223 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 [2021-11-22 16:25:27,248 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 15 treesize of output 11 [2021-11-22 16:25:28,709 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 34 treesize of output 28 [2021-11-22 16:25:28,930 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-22 16:25:28,931 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 39 treesize of output 24 [2021-11-22 16:25:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 578 proven. 335 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:34,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:25:34,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 109 [2021-11-22 16:25:34,551 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 34 treesize of output 32 [2021-11-22 16:25:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-22 16:25:37,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397895981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:37,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:37,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 49] total 112 [2021-11-22 16:25:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066065318] [2021-11-22 16:25:37,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:37,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-22 16:25:37,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-22 16:25:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=11563, Unknown=1, NotChecked=0, Total=12432 [2021-11-22 16:25:37,139 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 112 states, 112 states have (on average 4.375) internal successors, (490), 112 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:46,593 INFO L93 Difference]: Finished difference Result 604 states and 608 transitions. [2021-11-22 16:25:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-22 16:25:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 4.375) internal successors, (490), 112 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-22 16:25:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:46,595 INFO L225 Difference]: With dead ends: 604 [2021-11-22 16:25:46,595 INFO L226 Difference]: Without dead ends: 231 [2021-11-22 16:25:46,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10551 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=5501, Invalid=44004, Unknown=1, NotChecked=0, Total=49506 [2021-11-22 16:25:46,597 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1062 mSDsluCounter, 3116 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 5623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1885 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:46,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 3172 Invalid, 5623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 3508 Invalid, 0 Unknown, 1885 Unchecked, 1.7s Time] [2021-11-22 16:25:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-22 16:25:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-11-22 16:25:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 224 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2021-11-22 16:25:46,602 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 213 [2021-11-22 16:25:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:46,602 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2021-11-22 16:25:46,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 4.375) internal successors, (490), 112 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2021-11-22 16:25:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-22 16:25:46,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:46,604 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:46,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-22 16:25:46,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:46,829 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1125284175, now seen corresponding path program 23 times [2021-11-22 16:25:46,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168334012] [2021-11-22 16:25:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:46,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 231 proven. 731 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:25:47,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168334012] [2021-11-22 16:25:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168334012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659982536] [2021-11-22 16:25:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:25:47,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:47,460 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:47,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-22 16:25:57,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-22 16:25:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-22 16:25:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:25:58,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:59,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:26:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:00,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659982536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:00,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:00,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 76 [2021-11-22 16:26:00,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7315681] [2021-11-22 16:26:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-22 16:26:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-22 16:26:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=5080, Unknown=0, NotChecked=0, Total=5852 [2021-11-22 16:26:00,265 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 77 states, 76 states have (on average 5.407894736842105) internal successors, (411), 77 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:01,649 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2021-11-22 16:26:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 16:26:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 5.407894736842105) internal successors, (411), 77 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-11-22 16:26:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:01,651 INFO L225 Difference]: With dead ends: 235 [2021-11-22 16:26:01,651 INFO L226 Difference]: Without dead ends: 235 [2021-11-22 16:26:01,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 395 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1782, Invalid=7148, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:26:01,651 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 741 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:01,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1553 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:26:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-22 16:26:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2021-11-22 16:26:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.017467248908297) internal successors, (233), 230 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) [2021-11-22 16:26:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-11-22 16:26:01,655 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2021-11-22 16:26:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:01,656 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-11-22 16:26:01,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 5.407894736842105) internal successors, (411), 77 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-11-22 16:26:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-22 16:26:01,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:01,658 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:01,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:01,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-22 16:26:01,866 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash -933666128, now seen corresponding path program 19 times [2021-11-22 16:26:01,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:01,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670804995] [2021-11-22 16:26:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:01,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 231 proven. 757 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:02,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670804995] [2021-11-22 16:26:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670804995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361981375] [2021-11-22 16:26:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:26:02,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:02,544 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:02,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-22 16:26:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-22 16:26:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:03,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:04,749 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 [2021-11-22 16:26:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:04,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361981375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:04,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:04,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 67 [2021-11-22 16:26:04,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054691058] [2021-11-22 16:26:04,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:04,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-22 16:26:04,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-22 16:26:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=4040, Unknown=0, NotChecked=0, Total=4556 [2021-11-22 16:26:04,933 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 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) [2021-11-22 16:26:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:06,729 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2021-11-22 16:26:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 16:26:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 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 223 [2021-11-22 16:26:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:06,730 INFO L225 Difference]: With dead ends: 234 [2021-11-22 16:26:06,730 INFO L226 Difference]: Without dead ends: 234 [2021-11-22 16:26:06,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 409 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1807, Invalid=7699, Unknown=0, NotChecked=0, Total=9506 [2021-11-22 16:26:06,731 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1247 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:06,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1247 Valid, 1637 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 16:26:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-22 16:26:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-22 16:26:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2021-11-22 16:26:06,735 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 223 [2021-11-22 16:26:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:06,736 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2021-11-22 16:26:06,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 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) [2021-11-22 16:26:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2021-11-22 16:26:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-22 16:26:06,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:06,738 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:06,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:06,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-22 16:26:06,956 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 246919633, now seen corresponding path program 24 times [2021-11-22 16:26:06,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:06,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448492406] [2021-11-22 16:26:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:06,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:08,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448492406] [2021-11-22 16:26:08,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448492406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033537727] [2021-11-22 16:26:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:26:08,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:08,009 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:08,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-22 16:26:25,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-22 16:26:25,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-22 16:26:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:26,003 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 [2021-11-22 16:26:27,142 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 21 treesize of output 17 [2021-11-22 16:26:27,220 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:26:27,221 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 35 treesize of output 34 [2021-11-22 16:26:30,536 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:26:30,537 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 38 treesize of output 23 [2021-11-22 16:26:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:30,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:31,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0)) is different from false [2021-11-22 16:26:31,525 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 [2021-11-22 16:26:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:32,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033537727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:32,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:32,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 87 [2021-11-22 16:26:32,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346515133] [2021-11-22 16:26:32,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:32,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-22 16:26:32,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-22 16:26:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7061, Unknown=1, NotChecked=168, Total=7482 [2021-11-22 16:26:32,869 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 87 states, 87 states have (on average 4.850574712643678) internal successors, (422), 87 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:37,415 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2021-11-22 16:26:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-22 16:26:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.850574712643678) internal successors, (422), 87 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-22 16:26:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:37,417 INFO L225 Difference]: With dead ends: 408 [2021-11-22 16:26:37,417 INFO L226 Difference]: Without dead ends: 240 [2021-11-22 16:26:37,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=368, Invalid=10139, Unknown=3, NotChecked=202, Total=10712 [2021-11-22 16:26:37,418 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 53 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:37,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3919 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1650 Invalid, 0 Unknown, 499 Unchecked, 0.6s Time] [2021-11-22 16:26:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-22 16:26:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-11-22 16:26:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 236 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2021-11-22 16:26:37,423 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 229 [2021-11-22 16:26:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:37,423 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2021-11-22 16:26:37,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.850574712643678) internal successors, (422), 87 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2021-11-22 16:26:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-22 16:26:37,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:37,425 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:37,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:37,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:37,638 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2078596308, now seen corresponding path program 25 times [2021-11-22 16:26:37,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086704389] [2021-11-22 16:26:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:37,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 276 proven. 844 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:38,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086704389] [2021-11-22 16:26:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086704389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651397137] [2021-11-22 16:26:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:26:38,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:38,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:38,299 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:38,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-22 16:26:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-22 16:26:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:39,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:40,750 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 [2021-11-22 16:26:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-22 16:26:41,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651397137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:41,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:41,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 68 [2021-11-22 16:26:41,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169266577] [2021-11-22 16:26:41,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:41,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-22 16:26:41,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-22 16:26:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=4151, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 16:26:41,012 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:42,711 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-11-22 16:26:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-22 16:26:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:26:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:42,713 INFO L225 Difference]: With dead ends: 247 [2021-11-22 16:26:42,713 INFO L226 Difference]: Without dead ends: 247 [2021-11-22 16:26:42,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 428 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1393, Invalid=6263, Unknown=0, NotChecked=0, Total=7656 [2021-11-22 16:26:42,714 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 543 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:42,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 1750 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 16:26:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-22 16:26:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2021-11-22 16:26:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 241 states have (on average 1.016597510373444) internal successors, (245), 242 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2021-11-22 16:26:42,717 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 233 [2021-11-22 16:26:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:42,718 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2021-11-22 16:26:42,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2021-11-22 16:26:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-22 16:26:42,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:42,720 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:42,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:42,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:42,945 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 371259637, now seen corresponding path program 20 times [2021-11-22 16:26:42,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:42,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306377345] [2021-11-22 16:26:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:42,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 68 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:26:45,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306377345] [2021-11-22 16:26:45,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306377345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750205373] [2021-11-22 16:26:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:26:45,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:45,117 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-22 16:26:45,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:26:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:45,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 301 conjunts are in the unsatisfiable core [2021-11-22 16:26:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:46,819 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 21 treesize of output 17 [2021-11-22 16:26:47,493 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 [2021-11-22 16:26:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 68 proven. 1404 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:26:47,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:50,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:26:50,556 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 103 treesize of output 103 [2021-11-22 16:26:50,624 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 40 treesize of output 36 [2021-11-22 16:26:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 68 proven. 1027 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-22 16:26:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750205373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:51,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:51,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 51, 51] total 121 [2021-11-22 16:26:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737381514] [2021-11-22 16:26:51,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:51,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-22 16:26:51,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-22 16:26:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=14158, Unknown=0, NotChecked=0, Total=14520 [2021-11-22 16:26:51,086 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 121 states, 121 states have (on average 3.925619834710744) internal successors, (475), 121 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:00,361 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2021-11-22 16:27:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-22 16:27:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.925619834710744) internal successors, (475), 121 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-22 16:27:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:00,363 INFO L225 Difference]: With dead ends: 367 [2021-11-22 16:27:00,363 INFO L226 Difference]: Without dead ends: 253 [2021-11-22 16:27:00,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 413 SyntacticMatches, 4 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1258, Invalid=27812, Unknown=0, NotChecked=0, Total=29070 [2021-11-22 16:27:00,364 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 888 mSDsluCounter, 6186 mSDsCounter, 0 mSdLazyCounter, 11810 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 6274 SdHoareTripleChecker+Invalid, 12203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 11810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:00,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 6274 Invalid, 12203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 11810 Invalid, 0 Unknown, 226 Unchecked, 4.9s Time] [2021-11-22 16:27:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-22 16:27:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2021-11-22 16:27:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 246 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2021-11-22 16:27:00,368 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 235 [2021-11-22 16:27:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:00,369 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2021-11-22 16:27:00,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.925619834710744) internal successors, (475), 121 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2021-11-22 16:27:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-22 16:27:00,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:00,371 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:00,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:00,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:00,596 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 680290552, now seen corresponding path program 21 times [2021-11-22 16:27:00,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605304356] [2021-11-22 16:27:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:00,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 276 proven. 872 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-22 16:27:01,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:01,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605304356] [2021-11-22 16:27:01,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605304356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:01,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058239929] [2021-11-22 16:27:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:27:01,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:01,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:01,407 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:01,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-22 16:27:22,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-22 16:27:22,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-22 16:27:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:22,136 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:27:22,137 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 [2021-11-22 16:27:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 325 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:27:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 378 proven. 1148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:27:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058239929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:29,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:29,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 50, 50] total 118 [2021-11-22 16:27:29,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932711824] [2021-11-22 16:27:29,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:29,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-22 16:27:29,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-22 16:27:29,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1674, Invalid=12368, Unknown=0, NotChecked=0, Total=14042 [2021-11-22 16:27:29,661 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 119 states, 118 states have (on average 5.161016949152542) internal successors, (609), 119 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:37,380 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2021-11-22 16:27:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-22 16:27:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 5.161016949152542) internal successors, (609), 119 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-22 16:27:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:37,383 INFO L225 Difference]: With dead ends: 445 [2021-11-22 16:27:37,383 INFO L226 Difference]: Without dead ends: 445 [2021-11-22 16:27:37,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=7287, Invalid=31325, Unknown=0, NotChecked=0, Total=38612 [2021-11-22 16:27:37,386 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 3057 mSDsluCounter, 2840 mSDsCounter, 0 mSdLazyCounter, 5233 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3057 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 5745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 5233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:37,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3057 Valid, 2932 Invalid, 5745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 5233 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-22 16:27:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-11-22 16:27:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 249. [2021-11-22 16:27:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 248 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2021-11-22 16:27:37,392 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2021-11-22 16:27:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:37,393 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2021-11-22 16:27:37,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 5.161016949152542) internal successors, (609), 119 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2021-11-22 16:27:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-22 16:27:37,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:37,395 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:37,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:37,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:37,609 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2100370919, now seen corresponding path program 26 times [2021-11-22 16:27:37,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:37,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050849360] [2021-11-22 16:27:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:37,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-22 16:27:38,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050849360] [2021-11-22 16:27:38,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050849360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105384475] [2021-11-22 16:27:38,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:27:38,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:38,985 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:39,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-22 16:27:39,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:27:39,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 293 conjunts are in the unsatisfiable core [2021-11-22 16:27:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:40,282 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 21 treesize of output 17 [2021-11-22 16:27:42,887 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 [2021-11-22 16:27:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-22 16:27:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:48,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:27:48,116 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 103 treesize of output 103 [2021-11-22 16:27:48,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-22 16:27:48,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:27:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2021-11-22 16:27:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-22 16:27:50,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105384475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:50,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:50,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 54] total 125 [2021-11-22 16:27:50,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650176562] [2021-11-22 16:27:50,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:50,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-22 16:27:50,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-22 16:27:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=15123, Unknown=1, NotChecked=0, Total=15500 [2021-11-22 16:27:50,018 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 125 states, 125 states have (on average 4.488) internal successors, (561), 125 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:59,423 INFO L93 Difference]: Finished difference Result 690 states and 695 transitions. [2021-11-22 16:27:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-22 16:27:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 4.488) internal successors, (561), 125 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-22 16:27:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:59,425 INFO L225 Difference]: With dead ends: 690 [2021-11-22 16:27:59,425 INFO L226 Difference]: Without dead ends: 263 [2021-11-22 16:27:59,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7083 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1118, Invalid=42771, Unknown=1, NotChecked=0, Total=43890 [2021-11-22 16:27:59,427 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 378 mSDsluCounter, 6045 mSDsCounter, 0 mSdLazyCounter, 6974 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 6124 SdHoareTripleChecker+Invalid, 7915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 868 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:59,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 6124 Invalid, 7915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 6974 Invalid, 0 Unknown, 868 Unchecked, 2.8s Time] [2021-11-22 16:27:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-22 16:27:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2021-11-22 16:27:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2021-11-22 16:27:59,431 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 245 [2021-11-22 16:27:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2021-11-22 16:27:59,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 4.488) internal successors, (561), 125 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2021-11-22 16:27:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-22 16:27:59,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:59,433 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:59,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-22 16:27:59,649 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2079263265, now seen corresponding path program 27 times [2021-11-22 16:27:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424396540] [2021-11-22 16:27:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:59,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:28:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 325 proven. 965 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:00,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:28:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424396540] [2021-11-22 16:28:00,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424396540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:28:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059445174] [2021-11-22 16:28:00,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:28:00,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:28:00,485 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:28:00,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-22 16:28:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-22 16:28:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-22 16:28:15,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 378 proven. 912 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:16,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:17,875 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 [2021-11-22 16:28:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 378 proven. 912 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:18,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059445174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:18,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:28:18,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 87 [2021-11-22 16:28:18,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141301075] [2021-11-22 16:28:18,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-22 16:28:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:28:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-22 16:28:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=6513, Unknown=0, NotChecked=0, Total=7656 [2021-11-22 16:28:18,124 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 88 states, 87 states have (on average 5.919540229885057) internal successors, (515), 88 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:20,147 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2021-11-22 16:28:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-22 16:28:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 5.919540229885057) internal successors, (515), 88 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-22 16:28:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:20,149 INFO L225 Difference]: With dead ends: 267 [2021-11-22 16:28:20,149 INFO L226 Difference]: Without dead ends: 267 [2021-11-22 16:28:20,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3460 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3066, Invalid=11696, Unknown=0, NotChecked=0, Total=14762 [2021-11-22 16:28:20,151 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 857 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:20,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1430 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:28:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-22 16:28:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 263. [2021-11-22 16:28:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 262 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-11-22 16:28:20,156 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 253 [2021-11-22 16:28:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:20,156 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-11-22 16:28:20,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 5.919540229885057) internal successors, (515), 88 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-11-22 16:28:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-22 16:28:20,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:20,174 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:20,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-22 16:28:20,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:20,384 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:28:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1012204736, now seen corresponding path program 22 times [2021-11-22 16:28:20,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:28:20,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269972356] [2021-11-22 16:28:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:28:20,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:28:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:28:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 325 proven. 995 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:21,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:28:21,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269972356] [2021-11-22 16:28:21,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269972356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:28:21,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421976074] [2021-11-22 16:28:21,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:28:21,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:28:21,356 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:28:21,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-22 16:28:21,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:28:21,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-22 16:28:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 378 proven. 942 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:23,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:24,418 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 [2021-11-22 16:28:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 378 proven. 942 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:24,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421976074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:24,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:28:24,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 75 [2021-11-22 16:28:24,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634403143] [2021-11-22 16:28:24,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:24,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-22 16:28:24,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:28:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-22 16:28:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=5052, Unknown=0, NotChecked=0, Total=5700 [2021-11-22 16:28:24,608 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 76 states, 75 states have (on average 5.333333333333333) internal successors, (400), 76 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:26,907 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2021-11-22 16:28:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-22 16:28:26,907 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 5.333333333333333) internal successors, (400), 76 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have 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 [2021-11-22 16:28:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:26,908 INFO L225 Difference]: With dead ends: 266 [2021-11-22 16:28:26,908 INFO L226 Difference]: Without dead ends: 266 [2021-11-22 16:28:26,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 469 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2281, Invalid=9709, Unknown=0, NotChecked=0, Total=11990 [2021-11-22 16:28:26,909 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 788 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:26,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 2133 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3174 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 16:28:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-22 16:28:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-11-22 16:28:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 263 states have (on average 1.015209125475285) internal successors, (267), 264 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) [2021-11-22 16:28:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2021-11-22 16:28:26,912 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 255 [2021-11-22 16:28:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:26,912 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2021-11-22 16:28:26,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 5.333333333333333) internal successors, (400), 76 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2021-11-22 16:28:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-22 16:28:26,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:26,914 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:26,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-22 16:28:27,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:27,129 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:28:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash -34038175, now seen corresponding path program 28 times [2021-11-22 16:28:27,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:28:27,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707174540] [2021-11-22 16:28:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:28:27,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:28:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:28:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 46 proven. 1365 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:28,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:28:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707174540] [2021-11-22 16:28:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707174540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:28:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668014393] [2021-11-22 16:28:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:28:28,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:28:28,536 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:28:28,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-22 16:28:29,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:28:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-22 16:28:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:29,140 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 [2021-11-22 16:28:30,799 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 21 treesize of output 17 [2021-11-22 16:28:30,882 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:28:30,882 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 35 treesize of output 34 [2021-11-22 16:28:36,953 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:28:36,954 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 49 treesize of output 34 [2021-11-22 16:28:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 46 proven. 1365 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:36,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:38,532 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 62 treesize of output 56 [2021-11-22 16:28:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 46 proven. 1365 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668014393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:40,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:28:40,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41, 41] total 99 [2021-11-22 16:28:40,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262101013] [2021-11-22 16:28:40,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-22 16:28:40,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:28:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-22 16:28:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=9410, Unknown=1, NotChecked=0, Total=9702 [2021-11-22 16:28:40,964 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 99 states, 99 states have (on average 4.838383838383838) internal successors, (479), 99 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:43,164 INFO L93 Difference]: Finished difference Result 464 states and 467 transitions. [2021-11-22 16:28:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-22 16:28:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.838383838383838) internal successors, (479), 99 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-11-22 16:28:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:43,165 INFO L225 Difference]: With dead ends: 464 [2021-11-22 16:28:43,165 INFO L226 Difference]: Without dead ends: 272 [2021-11-22 16:28:43,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 462 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=435, Invalid=13606, Unknown=1, NotChecked=0, Total=14042 [2021-11-22 16:28:43,167 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 63 mSDsluCounter, 4753 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4842 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:43,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 4842 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2193 Invalid, 0 Unknown, 522 Unchecked, 0.9s Time] [2021-11-22 16:28:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-22 16:28:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-22 16:28:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 268 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2021-11-22 16:28:43,171 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 261 [2021-11-22 16:28:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:43,172 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2021-11-22 16:28:43,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.838383838383838) internal successors, (479), 99 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2021-11-22 16:28:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-22 16:28:43,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:43,174 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:43,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-22 16:28:43,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-22 16:28:43,385 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:28:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash 759233892, now seen corresponding path program 29 times [2021-11-22 16:28:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:28:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043827176] [2021-11-22 16:28:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:28:43,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:28:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:28:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 378 proven. 1094 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:28:44,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:28:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043827176] [2021-11-22 16:28:44,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043827176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:28:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552740255] [2021-11-22 16:28:44,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:28:44,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:28:44,261 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:28:44,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-22 16:29:19,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-22 16:29:19,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:29:20,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 159 conjunts are in the unsatisfiable core [2021-11-22 16:29:20,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 435 proven. 1037 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:29:21,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:22,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 16:29:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 435 proven. 1037 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-22 16:29:24,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552740255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:24,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:24,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 91 [2021-11-22 16:29:24,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028969862] [2021-11-22 16:29:24,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:24,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-22 16:29:24,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-22 16:29:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1111, Invalid=7261, Unknown=0, NotChecked=0, Total=8372 [2021-11-22 16:29:24,123 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 92 states, 91 states have (on average 5.43956043956044) internal successors, (495), 92 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) [2021-11-22 16:29:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:29:26,129 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2021-11-22 16:29:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 16:29:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 5.43956043956044) internal successors, (495), 92 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 265 [2021-11-22 16:29:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:29:26,131 INFO L225 Difference]: With dead ends: 279 [2021-11-22 16:29:26,131 INFO L226 Difference]: Without dead ends: 279 [2021-11-22 16:29:26,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2511, Invalid=10145, Unknown=0, NotChecked=0, Total=12656 [2021-11-22 16:29:26,132 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1271 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:29:26,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 2178 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 16:29:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-22 16:29:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2021-11-22 16:29:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.0146520146520146) internal successors, (277), 274 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2021-11-22 16:29:26,135 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 265 [2021-11-22 16:29:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:29:26,135 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2021-11-22 16:29:26,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 5.43956043956044) internal successors, (495), 92 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) [2021-11-22 16:29:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2021-11-22 16:29:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-22 16:29:26,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:29:26,136 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:29:26,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-22 16:29:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-22 16:29:26,337 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:29:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:29:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash -520669819, now seen corresponding path program 23 times [2021-11-22 16:29:26,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:29:26,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502257093] [2021-11-22 16:29:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:29:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:29:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 78 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:29:28,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:29:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502257093] [2021-11-22 16:29:28,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502257093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:29:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695700133] [2021-11-22 16:29:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:29:28,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:29:28,834 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:29:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-22 16:30:04,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-22 16:30:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:30:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 313 conjunts are in the unsatisfiable core [2021-11-22 16:30:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:04,225 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:30:04,226 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 [2021-11-22 16:30:07,987 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 23 treesize of output 19 [2021-11-22 16:30:14,117 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 41 treesize of output 35 [2021-11-22 16:30:14,577 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-22 16:30:14,577 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 46 treesize of output 30 [2021-11-22 16:30:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 78 proven. 1860 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:30:14,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:22,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:30:22,676 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 109 treesize of output 109 [2021-11-22 16:30:22,688 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 34 treesize of output 32 [2021-11-22 16:30:22,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:30:22,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2021-11-22 16:30:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 78 proven. 1365 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-22 16:30:28,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695700133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:30:28,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:30:28,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 74, 59] total 188 [2021-11-22 16:30:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681238219] [2021-11-22 16:30:28,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:30:28,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2021-11-22 16:30:28,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:30:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2021-11-22 16:30:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1495, Invalid=33661, Unknown=0, NotChecked=0, Total=35156 [2021-11-22 16:30:28,983 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand has 188 states, 188 states have (on average 3.8297872340425534) internal successors, (720), 188 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:41,593 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2021-11-22 16:30:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-22 16:30:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 3.8297872340425534) internal successors, (720), 188 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-22 16:30:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:41,596 INFO L225 Difference]: With dead ends: 415 [2021-11-22 16:30:41,596 INFO L226 Difference]: Without dead ends: 285 [2021-11-22 16:30:41,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15640 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=2998, Invalid=66962, Unknown=0, NotChecked=0, Total=69960 [2021-11-22 16:30:41,600 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 675 mSDsluCounter, 8794 mSDsCounter, 0 mSdLazyCounter, 7817 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 8880 SdHoareTripleChecker+Invalid, 9812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1892 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:41,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 8880 Invalid, 9812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7817 Invalid, 0 Unknown, 1892 Unchecked, 3.3s Time] [2021-11-22 16:30:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-22 16:30:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 279. [2021-11-22 16:30:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.0144404332129964) internal successors, (281), 278 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2021-11-22 16:30:41,605 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 267 [2021-11-22 16:30:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2021-11-22 16:30:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 3.8297872340425534) internal successors, (720), 188 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2021-11-22 16:30:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-22 16:30:41,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:41,608 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:41,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:41,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-22 16:30:41,824 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:30:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1070668168, now seen corresponding path program 24 times [2021-11-22 16:30:41,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:30:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499893912] [2021-11-22 16:30:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:41,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:30:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 378 proven. 1126 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-22 16:30:42,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:30:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499893912] [2021-11-22 16:30:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499893912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:30:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73919578] [2021-11-22 16:30:42,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:30:42,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:30:42,756 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:30:42,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-22 16:31:45,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-22 16:31:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:31:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-22 16:31:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:31:45,824 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:31:45,824 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 [2021-11-22 16:31:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 435 proven. 1069 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-22 16:31:48,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:31:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 496 proven. 1008 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-22 16:31:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73919578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:31:51,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:31:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 113 [2021-11-22 16:31:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955263941] [2021-11-22 16:31:51,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:31:51,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-22 16:31:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:31:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-22 16:31:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=11159, Unknown=0, NotChecked=0, Total=12882 [2021-11-22 16:31:51,588 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 114 states, 113 states have (on average 5.530973451327434) internal successors, (625), 114 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:31:54,137 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-11-22 16:31:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-22 16:31:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 5.530973451327434) internal successors, (625), 114 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-22 16:31:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:31:54,139 INFO L225 Difference]: With dead ends: 282 [2021-11-22 16:31:54,139 INFO L226 Difference]: Without dead ends: 282 [2021-11-22 16:31:54,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4502, Invalid=17848, Unknown=0, NotChecked=0, Total=22350 [2021-11-22 16:31:54,141 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1213 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:31:54,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1213 Valid, 1423 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:31:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-22 16:31:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-11-22 16:31:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.014336917562724) internal successors, (283), 280 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) [2021-11-22 16:31:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2021-11-22 16:31:54,145 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 271 [2021-11-22 16:31:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:31:54,145 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2021-11-22 16:31:54,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 5.530973451327434) internal successors, (625), 114 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2021-11-22 16:31:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-22 16:31:54,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:31:54,147 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:31:54,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-22 16:31:54,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-22 16:31:54,367 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:31:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:31:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash 558950057, now seen corresponding path program 30 times [2021-11-22 16:31:54,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:31:54,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408340008] [2021-11-22 16:31:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:31:54,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:31:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:31:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2097 backedges. 49 proven. 1552 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-22 16:31:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:31:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408340008] [2021-11-22 16:31:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408340008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:31:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087734995] [2021-11-22 16:31:55,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:31:55,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:31:55,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:31:55,631 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:31:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee53919-902a-4af8-9318-975e4d80762f/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process