./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF --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 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:47:42,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:47:42,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:47:42,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:47:42,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:47:42,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:47:42,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:47:42,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:47:42,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:47:42,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:47:43,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:47:43,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:47:43,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:47:43,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:47:43,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:47:43,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:47:43,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:47:43,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:47:43,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:47:43,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:47:43,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:47:43,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:47:43,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:47:43,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:47:43,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:47:43,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:47:43,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:47:43,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:47:43,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:47:43,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:47:43,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:47:43,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:47:43,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:47:43,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:47:43,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:47:43,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:47:43,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:47:43,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:47:43,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:47:43,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:47:43,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:47:43,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:47:43,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:47:43,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:47:43,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:47:43,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:47:43,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:47:43,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:47:43,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:47:43,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:47:43,097 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:47:43,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:47:43,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:47:43,099 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:47:43,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:47:43,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:47:43,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:47:43,099 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:47:43,100 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:47:43,100 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:47:43,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:47:43,100 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:47:43,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:47:43,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:47:43,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:47:43,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:47:43,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:47:43,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:47:43,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:47:43,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:47:43,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:47:43,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:47:43,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:47:43,104 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_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2021-11-20 05:47:43,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:47:43,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:47:43,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:47:43,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:47:43,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:47:43,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-11-20 05:47:43,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/data/564273dfd/31b1aae69f114039b94139464cc6c667/FLAGacf482222 [2021-11-20 05:47:44,030 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:47:44,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-11-20 05:47:44,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/data/564273dfd/31b1aae69f114039b94139464cc6c667/FLAGacf482222 [2021-11-20 05:47:44,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/data/564273dfd/31b1aae69f114039b94139464cc6c667 [2021-11-20 05:47:44,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:47:44,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:47:44,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:47:44,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:47:44,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:47:44,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c86ef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44, skipping insertion in model container [2021-11-20 05:47:44,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:47:44,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:47:44,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:47:44,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:47:44,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:47:44,761 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:47:44,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44 WrapperNode [2021-11-20 05:47:44,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:47:44,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:47:44,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:47:44,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:47:44,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,804 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-11-20 05:47:44,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:47:44,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:47:44,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:47:44,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:47:44,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:47:44,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:47:44,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:47:44,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:47:44,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (1/1) ... [2021-11-20 05:47:44,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:47:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:44,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:47:44,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:47:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:47:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:47:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:47:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:47:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:47:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:47:45,080 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:47:45,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:47:45,323 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:47:45,335 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:47:45,335 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 05:47:45,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:45 BoogieIcfgContainer [2021-11-20 05:47:45,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:47:45,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:47:45,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:47:45,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:47:45,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:47:44" (1/3) ... [2021-11-20 05:47:45,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429049f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:45, skipping insertion in model container [2021-11-20 05:47:45,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:44" (2/3) ... [2021-11-20 05:47:45,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429049f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:45, skipping insertion in model container [2021-11-20 05:47:45,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:45" (3/3) ... [2021-11-20 05:47:45,350 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2021-11-20 05:47:45,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:47:45,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-20 05:47:45,426 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:47:45,443 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 [2021-11-20 05:47:45,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-20 05:47:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 05:47:45,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:45,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 05:47:45,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-20 05:47:45,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:45,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781304153] [2021-11-20 05:47:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:45,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:45,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781304153] [2021-11-20 05:47:45,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781304153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:45,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:45,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:47:45,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375170645] [2021-11-20 05:47:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:45,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:45,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:45,824 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 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 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:45,897 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-20 05:47:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 05:47:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:45,909 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:47:45,909 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 05:47:45,912 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 [2021-11-20 05:47:45,917 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:45,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 05:47:45,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2021-11-20 05:47:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-20 05:47:45,956 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2021-11-20 05:47:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-20 05:47:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-20 05:47:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 05:47:45,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:45,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 05:47:45,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:47:45,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-11-20 05:47:45,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191860319] [2021-11-20 05:47:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:45,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191860319] [2021-11-20 05:47:46,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191860319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:46,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:46,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:47:46,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132206757] [2021-11-20 05:47:46,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:46,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:47:46,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:47:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:47:46,053 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:46,083 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-20 05:47:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:47:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 05:47:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:46,085 INFO L225 Difference]: With dead ends: 32 [2021-11-20 05:47:46,085 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 05:47:46,085 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 [2021-11-20 05:47:46,087 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:46,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 05:47:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 05:47:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 05:47:46,094 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-20 05:47:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 05:47:46,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 05:47:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 05:47:46,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:46,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 05:47:46,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:47:46,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-11-20 05:47:46,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:46,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878691599] [2021-11-20 05:47:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878691599] [2021-11-20 05:47:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878691599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:46,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:46,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:47:46,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542444923] [2021-11-20 05:47:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:46,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:46,210 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:46,243 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-20 05:47:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 05:47:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:46,245 INFO L225 Difference]: With dead ends: 31 [2021-11-20 05:47:46,245 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 05:47:46,245 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 [2021-11-20 05:47:46,247 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:46,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 05:47:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 05:47:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-20 05:47:46,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2021-11-20 05:47:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:46,255 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-20 05:47:46,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-20 05:47:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 05:47:46,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:46,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 05:47:46,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:47:46,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-11-20 05:47:46,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:46,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837960605] [2021-11-20 05:47:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837960605] [2021-11-20 05:47:46,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837960605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:46,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:46,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:47:46,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204476000] [2021-11-20 05:47:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:46,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:47:46,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:47:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:46,356 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:46,443 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-11-20 05:47:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:46,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 05:47:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:46,446 INFO L225 Difference]: With dead ends: 55 [2021-11-20 05:47:46,446 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 05:47:46,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:46,449 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:46,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 05:47:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-20 05:47:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-20 05:47:46,467 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-11-20 05:47:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:46,467 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-20 05:47:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-20 05:47:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:47:46,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:46,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:46,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:47:46,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-11-20 05:47:46,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475912865] [2021-11-20 05:47:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475912865] [2021-11-20 05:47:46,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475912865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:46,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:46,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:47:46,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230949193] [2021-11-20 05:47:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:46,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:46,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:46,555 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:46,624 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-20 05:47:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:47:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:46,629 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:47:46,629 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 05:47:46,630 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 [2021-11-20 05:47:46,642 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:46,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 05:47:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 05:47:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-20 05:47:46,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 8 [2021-11-20 05:47:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:46,657 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-20 05:47:46,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-20 05:47:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:47:46,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:46,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:46,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:47:46,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-11-20 05:47:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:46,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748177116] [2021-11-20 05:47:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748177116] [2021-11-20 05:47:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748177116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:46,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:47:46,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785506553] [2021-11-20 05:47:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:46,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:47:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:47:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:47:46,776 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:46,832 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-20 05:47:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:47:46,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:47:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:46,834 INFO L225 Difference]: With dead ends: 42 [2021-11-20 05:47:46,834 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 05:47:46,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:47:46,835 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:46,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 05:47:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-11-20 05:47:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-20 05:47:46,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 8 [2021-11-20 05:47:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-20 05:47:46,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-20 05:47:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:47:46,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:46,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:46,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:47:46,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-20 05:47:46,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:46,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489586374] [2021-11-20 05:47:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:46,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489586374] [2021-11-20 05:47:46,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489586374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13874176] [2021-11-20 05:47:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:46,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:46,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:46,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:47:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:47:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:47,123 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:47:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:47,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:47,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13874176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:47,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:47,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 05:47:47,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792686999] [2021-11-20 05:47:47,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:47,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:47:47,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:47:47,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:47:47,556 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:47,774 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-11-20 05:47:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:47:47,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:47:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:47,777 INFO L225 Difference]: With dead ends: 87 [2021-11-20 05:47:47,777 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 05:47:47,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:47:47,778 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:47,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 126 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 05:47:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 34. [2021-11-20 05:47:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-20 05:47:47,785 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2021-11-20 05:47:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:47,785 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-20 05:47:47,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-20 05:47:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:47:47,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:47,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:47,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:48,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:47:48,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:48,003 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2021-11-20 05:47:48,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:48,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596773096] [2021-11-20 05:47:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596773096] [2021-11-20 05:47:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596773096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:48,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:48,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:47:48,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333718159] [2021-11-20 05:47:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:48,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:47:48,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:47:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:47:48,056 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:48,070 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-11-20 05:47:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:47:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:47:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:48,077 INFO L225 Difference]: With dead ends: 36 [2021-11-20 05:47:48,077 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 05:47:48,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:47:48,079 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:48,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 05:47:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 05:47:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-20 05:47:48,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2021-11-20 05:47:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-20 05:47:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-20 05:47:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:47:48,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:48,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:48,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:47:48,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:48,087 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2021-11-20 05:47:48,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864751759] [2021-11-20 05:47:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:48,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864751759] [2021-11-20 05:47:48,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864751759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:48,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:48,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:47:48,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440093322] [2021-11-20 05:47:48,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:48,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:47:48,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:47:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:47:48,224 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-20 05:47:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:48,340 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-11-20 05:47:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:47:48,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 [2021-11-20 05:47:48,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:48,342 INFO L225 Difference]: With dead ends: 48 [2021-11-20 05:47:48,342 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 05:47:48,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:47:48,345 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:48,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 05:47:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-11-20 05:47:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-20 05:47:48,357 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2021-11-20 05:47:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:48,357 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-20 05:47:48,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-20 05:47:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-20 05:47:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:47:48,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:48,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:47:48,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2021-11-20 05:47:48,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:48,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117985349] [2021-11-20 05:47:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:48,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:48,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117985349] [2021-11-20 05:47:48,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117985349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:48,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 05:47:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384218026] [2021-11-20 05:47:48,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:48,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:47:48,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:47:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:47:48,527 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-20 05:47:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:48,696 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-20 05:47:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:47:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 [2021-11-20 05:47:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:48,700 INFO L225 Difference]: With dead ends: 57 [2021-11-20 05:47:48,701 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 05:47:48,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:47:48,702 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:48,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 05:47:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-11-20 05:47:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-20 05:47:48,714 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2021-11-20 05:47:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:48,714 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-20 05:47:48,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-20 05:47:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-20 05:47:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:47:48,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:48,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:48,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:47:48,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1506335819, now seen corresponding path program 1 times [2021-11-20 05:47:48,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:48,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829501348] [2021-11-20 05:47:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:48,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829501348] [2021-11-20 05:47:48,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829501348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:48,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:47:48,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912022932] [2021-11-20 05:47:48,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:48,824 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:48,840 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-20 05:47:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 05:47:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:48,842 INFO L225 Difference]: With dead ends: 41 [2021-11-20 05:47:48,842 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:47:48,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:48,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:48,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:47:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 05:47:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-20 05:47:48,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-11-20 05:47:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:48,859 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-20 05:47:48,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-20 05:47:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:47:48,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:48,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:47:48,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2021-11-20 05:47:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974419554] [2021-11-20 05:47:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:48,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974419554] [2021-11-20 05:47:48,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974419554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:48,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871289875] [2021-11-20 05:47:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:48,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:48,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:48,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:49,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:47:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:49,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:47:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:49,304 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 [2021-11-20 05:47:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871289875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:49,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:49,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-20 05:47:49,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890306687] [2021-11-20 05:47:49,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:49,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:47:49,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:47:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:47:49,340 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:49,473 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-20 05:47:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:47:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 05:47:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:49,475 INFO L225 Difference]: With dead ends: 37 [2021-11-20 05:47:49,475 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 05:47:49,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:47:49,476 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:49,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 62 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 05:47:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-20 05:47:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-20 05:47:49,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-11-20 05:47:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-20 05:47:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-20 05:47:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:47:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:49,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:49,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:47:49,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2021-11-20 05:47:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:49,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713476927] [2021-11-20 05:47:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:49,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:49,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:49,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713476927] [2021-11-20 05:47:49,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713476927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902728160] [2021-11-20 05:47:49,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:47:49,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:49,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:49,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:47:50,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:47:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:47:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:50,074 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 25 treesize of output 21 [2021-11-20 05:47:50,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:47:50,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 05:47:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:50,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:51,196 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 36 treesize of output 34 [2021-11-20 05:47:51,199 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 30 [2021-11-20 05:47:51,208 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 39 treesize of output 35 [2021-11-20 05:47:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:51,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902728160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:51,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:51,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-11-20 05:47:51,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538292911] [2021-11-20 05:47:51,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:51,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:47:51,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:47:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:47:51,252 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 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) [2021-11-20 05:47:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:51,780 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-20 05:47:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:47:51,781 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 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) Word has length 24 [2021-11-20 05:47:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:51,781 INFO L225 Difference]: With dead ends: 54 [2021-11-20 05:47:51,781 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 05:47:51,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:47:51,783 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:51,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 154 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-20 05:47:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 05:47:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-20 05:47:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-20 05:47:51,786 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2021-11-20 05:47:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:51,787 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-20 05:47:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 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) [2021-11-20 05:47:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-20 05:47:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:47:51,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:51,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:51,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:51,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:47:51,999 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2021-11-20 05:47:51,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:51,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145252124] [2021-11-20 05:47:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:52,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:52,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:52,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145252124] [2021-11-20 05:47:52,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145252124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875286233] [2021-11-20 05:47:52,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:47:52,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:52,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:52,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:47:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:47:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 05:47:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:47:52,547 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 [2021-11-20 05:47:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:52,674 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 [2021-11-20 05:47:52,683 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 [2021-11-20 05:47:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875286233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:52,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:52,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-11-20 05:47:52,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884160234] [2021-11-20 05:47:52,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:47:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:47:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:47:52,836 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:53,130 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-11-20 05:47:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:47:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 05:47:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:53,132 INFO L225 Difference]: With dead ends: 59 [2021-11-20 05:47:53,132 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 05:47:53,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:47:53,133 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:53,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 142 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-20 05:47:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 05:47:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-20 05:47:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-20 05:47:53,136 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-11-20 05:47:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:53,136 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-20 05:47:53,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-20 05:47:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:47:53,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:53,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:53,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:53,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:47:53,363 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2021-11-20 05:47:53,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587679565] [2021-11-20 05:47:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:53,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:53,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587679565] [2021-11-20 05:47:53,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587679565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:53,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124708295] [2021-11-20 05:47:53,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:47:53,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:53,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:53,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:47:53,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:47:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 05:47:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:53,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:54,179 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 [2021-11-20 05:47:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:54,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124708295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:54,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:54,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-11-20 05:47:54,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790399145] [2021-11-20 05:47:54,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:54,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:47:54,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:54,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:47:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:47:54,356 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:54,615 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-20 05:47:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:47:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 05:47:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:54,617 INFO L225 Difference]: With dead ends: 50 [2021-11-20 05:47:54,617 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 05:47:54,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:47:54,618 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:54,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 189 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:47:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 05:47:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-11-20 05:47:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2021-11-20 05:47:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-20 05:47:54,622 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2021-11-20 05:47:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:54,622 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-20 05:47:54,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-20 05:47:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:47:54,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:54,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:54,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:54,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:54,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2021-11-20 05:47:54,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:54,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147677448] [2021-11-20 05:47:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:54,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:55,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147677448] [2021-11-20 05:47:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147677448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728080806] [2021-11-20 05:47:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:47:55,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:55,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:47:55,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 05:47:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 05:47:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:55,297 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 [2021-11-20 05:47:55,510 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 [2021-11-20 05:47:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:55,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:55,631 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 [2021-11-20 05:47:55,634 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 [2021-11-20 05:47:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:55,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728080806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:55,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:55,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2021-11-20 05:47:55,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66012218] [2021-11-20 05:47:55,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:55,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:47:55,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:47:55,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:47:55,821 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:56,264 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-11-20 05:47:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:47:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 05:47:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:56,266 INFO L225 Difference]: With dead ends: 75 [2021-11-20 05:47:56,266 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 05:47:56,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:47:56,267 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:56,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 245 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-20 05:47:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 05:47:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-20 05:47:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2021-11-20 05:47:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-20 05:47:56,270 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-11-20 05:47:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:56,270 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-20 05:47:56,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-20 05:47:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:47:56,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:56,272 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:56,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:56,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:56,487 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2021-11-20 05:47:56,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:56,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677409148] [2021-11-20 05:47:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:56,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:56,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677409148] [2021-11-20 05:47:56,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677409148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073860431] [2021-11-20 05:47:56,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:47:56,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:56,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:56,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:47:56,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 05:47:56,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:56,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:47:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:57,467 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 [2021-11-20 05:47:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073860431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:57,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:57,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-11-20 05:47:57,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784971641] [2021-11-20 05:47:57,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:57,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:47:57,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:47:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:47:57,535 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:57,801 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-20 05:47:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:47:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-20 05:47:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:57,802 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:47:57,802 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:47:57,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:47:57,804 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:57,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 164 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:47:57,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:47:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-20 05:47:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2021-11-20 05:47:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-20 05:47:57,807 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2021-11-20 05:47:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:57,808 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-20 05:47:57,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:47:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-20 05:47:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:47:57,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:57,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:57,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:58,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:47:58,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:47:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2021-11-20 05:47:58,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943066304] [2021-11-20 05:47:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:58,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:58,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943066304] [2021-11-20 05:47:58,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943066304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:47:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001848083] [2021-11-20 05:47:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:47:58,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:58,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:47:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 05:47:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:58,684 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 [2021-11-20 05:47:59,069 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 [2021-11-20 05:47:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:59,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:59,291 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 22 treesize of output 20 [2021-11-20 05:47:59,293 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 32 treesize of output 28 [2021-11-20 05:47:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001848083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:59,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:47:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2021-11-20 05:47:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864381262] [2021-11-20 05:47:59,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:47:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:47:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:47:59,827 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2021-11-20 05:48:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:00,470 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-20 05:48:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:48:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 05:48:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:00,472 INFO L225 Difference]: With dead ends: 91 [2021-11-20 05:48:00,472 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 05:48:00,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:48:00,474 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:00,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 374 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 581 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2021-11-20 05:48:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 05:48:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-20 05:48:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2021-11-20 05:48:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-20 05:48:00,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-11-20 05:48:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:00,477 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-20 05:48:00,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2021-11-20 05:48:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-20 05:48:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:48:00,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:00,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:00,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:48:00,696 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2021-11-20 05:48:00,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081835486] [2021-11-20 05:48:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:00,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:00,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081835486] [2021-11-20 05:48:00,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081835486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952753202] [2021-11-20 05:48:00,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:48:00,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:00,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:00,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:48:01,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:48:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 05:48:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:01,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:01,797 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 [2021-11-20 05:48:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:01,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952753202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:01,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:01,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-11-20 05:48:01,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948999230] [2021-11-20 05:48:01,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:01,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:48:01,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:48:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:48:01,869 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 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) [2021-11-20 05:48:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:02,229 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-20 05:48:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:48:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 05:48:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:02,230 INFO L225 Difference]: With dead ends: 70 [2021-11-20 05:48:02,230 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 05:48:02,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:48:02,231 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 357 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 282 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 05:48:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-11-20 05:48:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-20 05:48:02,235 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2021-11-20 05:48:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-20 05:48:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 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) [2021-11-20 05:48:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-20 05:48:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 05:48:02,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:02,237 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:02,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:02,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:02,451 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2021-11-20 05:48:02,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:02,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575113577] [2021-11-20 05:48:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:02,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:02,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575113577] [2021-11-20 05:48:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575113577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861061232] [2021-11-20 05:48:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:48:02,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:02,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:02,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:48:02,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 05:48:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 05:48:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:03,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:48:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 05:48:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:03,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:03,533 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 [2021-11-20 05:48:03,535 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 [2021-11-20 05:48:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:03,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861061232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:03,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-11-20 05:48:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925458831] [2021-11-20 05:48:03,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:48:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:48:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:48:03,730 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2021-11-20 05:48:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:04,350 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2021-11-20 05:48:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:48:04,350 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-20 05:48:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:04,351 INFO L225 Difference]: With dead ends: 107 [2021-11-20 05:48:04,351 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:48:04,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:48:04,352 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:04,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 414 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 638 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-11-20 05:48:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:48:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-20 05:48:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-20 05:48:04,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2021-11-20 05:48:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:04,356 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-20 05:48:04,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2021-11-20 05:48:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-20 05:48:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:48:04,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:04,358 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:04,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:04,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:04,563 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2021-11-20 05:48:04,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:04,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553326166] [2021-11-20 05:48:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:04,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:04,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:04,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553326166] [2021-11-20 05:48:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553326166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042260180] [2021-11-20 05:48:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:48:04,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:04,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:04,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:48:04,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:48:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:48:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:05,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:05,723 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 [2021-11-20 05:48:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:05,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042260180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:05,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:05,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-20 05:48:05,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470498318] [2021-11-20 05:48:05,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:05,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:48:05,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:48:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:48:05,811 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:06,254 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-20 05:48:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:48:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 05:48:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:06,260 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:48:06,260 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 05:48:06,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:48:06,263 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 266 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:06,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 339 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:48:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 05:48:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-20 05:48:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-20 05:48:06,273 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2021-11-20 05:48:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:06,275 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-20 05:48:06,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-20 05:48:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 05:48:06,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:06,277 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:06,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:06,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:06,490 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2021-11-20 05:48:06,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:06,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571241253] [2021-11-20 05:48:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:06,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:06,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571241253] [2021-11-20 05:48:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571241253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082368596] [2021-11-20 05:48:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:48:06,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:06,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:06,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:48:06,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 05:48:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 05:48:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:06,930 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:07,278 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 [2021-11-20 05:48:07,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:48:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-20 05:48:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:08,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:08,863 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 [2021-11-20 05:48:08,868 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 [2021-11-20 05:48:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082368596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:09,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:09,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2021-11-20 05:48:09,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013177031] [2021-11-20 05:48:09,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:09,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-20 05:48:09,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-20 05:48:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3156, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 05:48:09,572 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:12,463 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2021-11-20 05:48:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 05:48:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-20 05:48:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:12,466 INFO L225 Difference]: With dead ends: 135 [2021-11-20 05:48:12,466 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:48:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1215, Invalid=7715, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 05:48:12,469 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1228 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:12,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 858 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:48:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:48:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-11-20 05:48:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-20 05:48:12,472 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 74 [2021-11-20 05:48:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:12,472 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-20 05:48:12,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-20 05:48:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:48:12,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:12,474 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:12,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:12,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:12,679 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2011937505, now seen corresponding path program 12 times [2021-11-20 05:48:12,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:12,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444975599] [2021-11-20 05:48:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:12,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 182 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:12,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:12,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444975599] [2021-11-20 05:48:12,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444975599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:12,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322822481] [2021-11-20 05:48:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:48:12,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:12,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:12,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:48:13,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 05:48:13,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:48:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:13,079 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:13,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322822481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:14,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:14,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-11-20 05:48:14,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360578490] [2021-11-20 05:48:14,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:14,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 05:48:14,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 05:48:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:48:14,579 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:14,919 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-11-20 05:48:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:48:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-20 05:48:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:14,920 INFO L225 Difference]: With dead ends: 149 [2021-11-20 05:48:14,920 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 05:48:14,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 05:48:14,922 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:14,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 270 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 05:48:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-11-20 05:48:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-20 05:48:14,925 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2021-11-20 05:48:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:14,926 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-20 05:48:14,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-20 05:48:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 05:48:14,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:14,927 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:14,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:15,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:15,135 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:15,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 13 times [2021-11-20 05:48:15,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:15,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343914114] [2021-11-20 05:48:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:15,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:15,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343914114] [2021-11-20 05:48:15,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343914114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762351876] [2021-11-20 05:48:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:48:15,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:15,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:15,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:48:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 05:48:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:15,933 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 25 treesize of output 21 [2021-11-20 05:48:17,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:48:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 05:48:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:18,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:19,422 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 36 treesize of output 34 [2021-11-20 05:48:19,425 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 30 [2021-11-20 05:48:19,428 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 39 treesize of output 35 [2021-11-20 05:48:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:19,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762351876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:19,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:19,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2021-11-20 05:48:19,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315963315] [2021-11-20 05:48:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:19,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 05:48:19,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 05:48:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 05:48:19,551 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:20,956 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-11-20 05:48:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 05:48:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-20 05:48:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:20,958 INFO L225 Difference]: With dead ends: 166 [2021-11-20 05:48:20,958 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 05:48:20,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=534, Invalid=6108, Unknown=0, NotChecked=0, Total=6642 [2021-11-20 05:48:20,960 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 241 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:20,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1164 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1076 Invalid, 0 Unknown, 223 Unchecked, 0.5s Time] [2021-11-20 05:48:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 05:48:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-11-20 05:48:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-20 05:48:20,972 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2021-11-20 05:48:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:20,972 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-20 05:48:20,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-20 05:48:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 05:48:20,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:20,974 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:21,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:21,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:21,198 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 14 times [2021-11-20 05:48:21,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641435209] [2021-11-20 05:48:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:21,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641435209] [2021-11-20 05:48:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641435209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406692748] [2021-11-20 05:48:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:48:21,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:21,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:21,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:48:21,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:48:21,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:48:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:22,063 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 25 treesize of output 21 [2021-11-20 05:48:24,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:48:24,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 05:48:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:24,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:26,169 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 36 treesize of output 34 [2021-11-20 05:48:26,171 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 30 [2021-11-20 05:48:26,185 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 39 treesize of output 35 [2021-11-20 05:48:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:26,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406692748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:26,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:26,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 69 [2021-11-20 05:48:26,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21589789] [2021-11-20 05:48:26,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:26,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 05:48:26,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 05:48:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4346, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 05:48:26,289 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:27,787 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2021-11-20 05:48:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:48:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-20 05:48:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:27,789 INFO L225 Difference]: With dead ends: 182 [2021-11-20 05:48:27,789 INFO L226 Difference]: Without dead ends: 123 [2021-11-20 05:48:27,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=600, Invalid=7056, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 05:48:27,791 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 260 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:27,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1362 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1250 Invalid, 0 Unknown, 265 Unchecked, 0.5s Time] [2021-11-20 05:48:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-20 05:48:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2021-11-20 05:48:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-11-20 05:48:27,795 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 104 [2021-11-20 05:48:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-11-20 05:48:27,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-11-20 05:48:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 05:48:27,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:27,798 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:27,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:28,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:48:28,019 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 15 times [2021-11-20 05:48:28,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:28,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771553392] [2021-11-20 05:48:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:28,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:28,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771553392] [2021-11-20 05:48:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771553392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562470664] [2021-11-20 05:48:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:48:28,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:28,617 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:28,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:48:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-20 05:48:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:28,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 05:48:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:29,296 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 [2021-11-20 05:48:29,597 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 [2021-11-20 05:48:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:29,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:29,834 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 [2021-11-20 05:48:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 05:48:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:30,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562470664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:30,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:30,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2021-11-20 05:48:30,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832753346] [2021-11-20 05:48:30,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:30,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 05:48:30,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 05:48:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:48:30,071 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:31,733 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2021-11-20 05:48:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 05:48:31,734 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-20 05:48:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:31,735 INFO L225 Difference]: With dead ends: 187 [2021-11-20 05:48:31,735 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 05:48:31,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=393, Invalid=4863, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 05:48:31,736 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 310 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:31,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1316 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:48:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 05:48:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-11-20 05:48:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-11-20 05:48:31,740 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2021-11-20 05:48:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:31,740 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-11-20 05:48:31,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-11-20 05:48:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 05:48:31,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:31,742 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:31,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:31,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 05:48:31,963 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1915770389, now seen corresponding path program 16 times [2021-11-20 05:48:31,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:31,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298030373] [2021-11-20 05:48:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:31,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:32,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298030373] [2021-11-20 05:48:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298030373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295063183] [2021-11-20 05:48:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:48:32,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:32,539 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:48:32,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:48:32,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 05:48:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 05:48:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:34,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295063183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:34,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:34,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-11-20 05:48:34,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998051635] [2021-11-20 05:48:34,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:34,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 05:48:34,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 05:48:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2700, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 05:48:34,281 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:35,037 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-11-20 05:48:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:48:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-20 05:48:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:35,038 INFO L225 Difference]: With dead ends: 130 [2021-11-20 05:48:35,038 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 05:48:35,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=891, Invalid=3939, Unknown=0, NotChecked=0, Total=4830 [2021-11-20 05:48:35,039 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 637 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:35,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 761 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:48:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 05:48:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-11-20 05:48:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-20 05:48:35,043 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 118 [2021-11-20 05:48:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:35,043 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-20 05:48:35,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-20 05:48:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 05:48:35,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:35,045 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:35,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:35,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 05:48:35,251 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 17 times [2021-11-20 05:48:35,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397911609] [2021-11-20 05:48:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:35,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:35,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397911609] [2021-11-20 05:48:35,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397911609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356555021] [2021-11-20 05:48:35,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:48:35,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:35,893 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:48:36,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-20 05:48:36,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 05:48:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:36,494 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 [2021-11-20 05:48:36,786 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 [2021-11-20 05:48:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:36,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:37,019 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 [2021-11-20 05:48:37,021 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 [2021-11-20 05:48:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:37,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356555021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:37,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:37,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2021-11-20 05:48:37,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017562207] [2021-11-20 05:48:37,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:37,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:48:37,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:48:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:48:37,265 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 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) [2021-11-20 05:48:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:39,162 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2021-11-20 05:48:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 05:48:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 05:48:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:39,167 INFO L225 Difference]: With dead ends: 203 [2021-11-20 05:48:39,167 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 05:48:39,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 05:48:39,169 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 269 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:39,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1589 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2492 Invalid, 0 Unknown, 122 Unchecked, 1.0s Time] [2021-11-20 05:48:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 05:48:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-11-20 05:48:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-20 05:48:39,176 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-11-20 05:48:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:39,177 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-20 05:48:39,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 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) [2021-11-20 05:48:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-20 05:48:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 05:48:39,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:39,188 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:39,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:39,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:39,391 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 18 times [2021-11-20 05:48:39,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993625409] [2021-11-20 05:48:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:40,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993625409] [2021-11-20 05:48:40,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993625409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679082863] [2021-11-20 05:48:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:48:40,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:40,031 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:40,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:48:40,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-20 05:48:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 05:48:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:40,464 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:41,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 276 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:43,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679082863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:43,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:43,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2021-11-20 05:48:43,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091698285] [2021-11-20 05:48:43,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:43,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-20 05:48:43,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-20 05:48:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 05:48:43,408 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:44,527 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-20 05:48:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:48:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-20 05:48:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:44,528 INFO L225 Difference]: With dead ends: 140 [2021-11-20 05:48:44,528 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 05:48:44,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1831, Invalid=7675, Unknown=0, NotChecked=0, Total=9506 [2021-11-20 05:48:44,531 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 450 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:44,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 792 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:48:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 05:48:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-11-20 05:48:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 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) [2021-11-20 05:48:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-20 05:48:44,535 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2021-11-20 05:48:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:44,535 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-20 05:48:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-20 05:48:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 05:48:44,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:44,537 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:44,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-20 05:48:44,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 05:48:44,751 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 19 times [2021-11-20 05:48:44,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:44,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743923838] [2021-11-20 05:48:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:44,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:45,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:45,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743923838] [2021-11-20 05:48:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743923838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102348952] [2021-11-20 05:48:45,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:48:45,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:45,395 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:45,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:48:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 05:48:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:46,006 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 [2021-11-20 05:48:46,354 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 [2021-11-20 05:48:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:46,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:46,606 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 [2021-11-20 05:48:46,608 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 [2021-11-20 05:48:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:46,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102348952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:46,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:46,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2021-11-20 05:48:46,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323056509] [2021-11-20 05:48:46,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:46,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 05:48:46,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 05:48:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2720, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 05:48:46,865 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:48,982 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2021-11-20 05:48:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:48:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-20 05:48:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:48,984 INFO L225 Difference]: With dead ends: 219 [2021-11-20 05:48:48,984 INFO L226 Difference]: Without dead ends: 142 [2021-11-20 05:48:48,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=445, Invalid=6361, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 05:48:48,985 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 291 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 3105 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:48,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1962 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3105 Invalid, 0 Unknown, 68 Unchecked, 1.1s Time] [2021-11-20 05:48:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-20 05:48:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2021-11-20 05:48:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-11-20 05:48:48,990 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2021-11-20 05:48:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:48,990 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-11-20 05:48:48,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-11-20 05:48:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 05:48:48,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:48,992 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:49,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-20 05:48:49,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:49,195 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash -394722493, now seen corresponding path program 20 times [2021-11-20 05:48:49,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:49,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077699010] [2021-11-20 05:48:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:49,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 231 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:49,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077699010] [2021-11-20 05:48:49,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077699010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843035024] [2021-11-20 05:48:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:48:49,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:49,852 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:49,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:48:49,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:48:49,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 05:48:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:50,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 05:48:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:51,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843035024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:51,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:51,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2021-11-20 05:48:51,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638313834] [2021-11-20 05:48:51,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:51,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 05:48:51,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 05:48:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3538, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 05:48:51,785 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 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) [2021-11-20 05:48:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:52,899 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2021-11-20 05:48:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:48:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 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) Word has length 138 [2021-11-20 05:48:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:52,900 INFO L225 Difference]: With dead ends: 150 [2021-11-20 05:48:52,900 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 05:48:52,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 05:48:52,901 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 640 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:52,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1096 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:48:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 05:48:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-11-20 05:48:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-20 05:48:52,906 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 138 [2021-11-20 05:48:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:52,906 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-20 05:48:52,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 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) [2021-11-20 05:48:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-20 05:48:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 05:48:52,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:52,908 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:52,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:53,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:53,123 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2021-11-20 05:48:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121013938] [2021-11-20 05:48:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:53,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:53,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121013938] [2021-11-20 05:48:53,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121013938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349166010] [2021-11-20 05:48:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:48:54,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:54,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:54,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:48:54,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-20 05:48:54,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 05:48:54,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:54,899 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 [2021-11-20 05:48:55,308 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 [2021-11-20 05:48:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:55,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:55,584 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 [2021-11-20 05:48:55,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 05:48:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:55,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349166010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:55,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:55,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2021-11-20 05:48:55,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049300421] [2021-11-20 05:48:55,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:55,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 05:48:55,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 05:48:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 05:48:55,855 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 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) [2021-11-20 05:48:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:58,252 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2021-11-20 05:48:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 05:48:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-20 05:48:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:58,253 INFO L225 Difference]: With dead ends: 235 [2021-11-20 05:48:58,253 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 05:48:58,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 263 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=471, Invalid=7185, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 05:48:58,258 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 388 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:58,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 2305 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3616 Invalid, 0 Unknown, 82 Unchecked, 1.3s Time] [2021-11-20 05:48:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 05:48:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-11-20 05:48:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-11-20 05:48:58,266 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2021-11-20 05:48:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-11-20 05:48:58,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 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) [2021-11-20 05:48:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-11-20 05:48:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 05:48:58,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:58,270 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:58,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 05:48:58,475 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:48:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2021-11-20 05:48:58,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:58,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327952282] [2021-11-20 05:48:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:58,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:59,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327952282] [2021-11-20 05:48:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327952282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546076702] [2021-11-20 05:48:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:48:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:59,244 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:59,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:48:59,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:48:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 05:48:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:00,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:01,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 05:49:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:01,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546076702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:01,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:01,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2021-11-20 05:49:01,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142429213] [2021-11-20 05:49:01,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:01,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 05:49:01,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:01,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 05:49:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 05:49:01,361 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:02,634 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2021-11-20 05:49:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 05:49:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-20 05:49:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:02,636 INFO L225 Difference]: With dead ends: 160 [2021-11-20 05:49:02,636 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 05:49:02,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1305, Invalid=5835, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 05:49:02,637 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 679 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:02,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1305 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:49:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 05:49:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-11-20 05:49:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-20 05:49:02,640 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2021-11-20 05:49:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:02,640 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-20 05:49:02,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-20 05:49:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 05:49:02,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:02,641 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:02,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 05:49:02,855 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2021-11-20 05:49:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978897060] [2021-11-20 05:49:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:03,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978897060] [2021-11-20 05:49:03,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978897060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75056329] [2021-11-20 05:49:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:49:03,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:03,705 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:03,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:49:03,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-20 05:49:03,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-20 05:49:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:04,580 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 [2021-11-20 05:49:04,922 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 [2021-11-20 05:49:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:05,195 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 [2021-11-20 05:49:05,197 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 [2021-11-20 05:49:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75056329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:05,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:05,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2021-11-20 05:49:05,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039463193] [2021-11-20 05:49:05,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:05,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 05:49:05,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 05:49:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3384, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:49:05,479 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 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) [2021-11-20 05:49:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:07,923 INFO L93 Difference]: Finished difference Result 251 states and 252 transitions. [2021-11-20 05:49:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 05:49:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-20 05:49:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:07,933 INFO L225 Difference]: With dead ends: 251 [2021-11-20 05:49:07,933 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 05:49:07,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 282 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=497, Invalid=8059, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 05:49:07,933 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 414 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:07,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 2392 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3735 Invalid, 0 Unknown, 87 Unchecked, 1.3s Time] [2021-11-20 05:49:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 05:49:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-11-20 05:49:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 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) [2021-11-20 05:49:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-11-20 05:49:07,938 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2021-11-20 05:49:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:07,938 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-11-20 05:49:07,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 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) [2021-11-20 05:49:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-11-20 05:49:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 05:49:07,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:07,940 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:07,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:08,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 05:49:08,151 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1723786127, now seen corresponding path program 24 times [2021-11-20 05:49:08,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037613299] [2021-11-20 05:49:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:08,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:08,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037613299] [2021-11-20 05:49:08,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037613299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612187807] [2021-11-20 05:49:08,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:49:08,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:08,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:08,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:49:09,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-20 05:49:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 05:49:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:10,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:11,735 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 7 treesize of output 5 [2021-11-20 05:49:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:11,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612187807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:11,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 86 [2021-11-20 05:49:11,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044147235] [2021-11-20 05:49:11,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:11,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-20 05:49:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-20 05:49:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=6350, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 05:49:11,905 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:12,920 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-11-20 05:49:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:49:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-20 05:49:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:12,921 INFO L225 Difference]: With dead ends: 170 [2021-11-20 05:49:12,921 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 05:49:12,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2131, Invalid=8789, Unknown=0, NotChecked=0, Total=10920 [2021-11-20 05:49:12,922 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 960 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:12,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 907 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:49:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 05:49:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-20 05:49:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-20 05:49:12,926 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 158 [2021-11-20 05:49:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:12,926 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-20 05:49:12,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-20 05:49:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 05:49:12,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:12,928 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:12,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:13,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 05:49:13,135 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 25 times [2021-11-20 05:49:13,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853058501] [2021-11-20 05:49:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:13,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:14,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853058501] [2021-11-20 05:49:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853058501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424929128] [2021-11-20 05:49:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:49:14,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:14,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:14,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 05:49:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-20 05:49:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:14,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 05:49:15,288 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 [2021-11-20 05:49:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:15,573 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 [2021-11-20 05:49:15,574 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 26 treesize of output 22 [2021-11-20 05:49:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:15,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424929128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:15,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:15,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2021-11-20 05:49:15,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192526407] [2021-11-20 05:49:15,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:15,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 05:49:15,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 05:49:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 05:49:15,870 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:18,554 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2021-11-20 05:49:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 05:49:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-20 05:49:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:18,556 INFO L225 Difference]: With dead ends: 267 [2021-11-20 05:49:18,556 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 05:49:18,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2021-11-20 05:49:18,558 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 602 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 4220 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 4343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:18,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 2652 Invalid, 4343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:49:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 05:49:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-11-20 05:49:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-11-20 05:49:18,562 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2021-11-20 05:49:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:18,563 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-11-20 05:49:18,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-11-20 05:49:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 05:49:18,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:18,565 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:18,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:18,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:18,791 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 26 times [2021-11-20 05:49:18,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:18,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292470122] [2021-11-20 05:49:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:18,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:19,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292470122] [2021-11-20 05:49:19,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292470122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:19,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713954052] [2021-11-20 05:49:19,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:49:19,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:19,582 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:19,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 05:49:19,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:49:19,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:19,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 05:49:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:20,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 05:49:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713954052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:21,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:21,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2021-11-20 05:49:21,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950792350] [2021-11-20 05:49:21,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:21,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-20 05:49:21,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-20 05:49:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=5005, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 05:49:21,859 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:23,387 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-11-20 05:49:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:49:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-20 05:49:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:23,389 INFO L225 Difference]: With dead ends: 180 [2021-11-20 05:49:23,389 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 05:49:23,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 05:49:23,390 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 849 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:23,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1648 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:49:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 05:49:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2021-11-20 05:49:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-11-20 05:49:23,395 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2021-11-20 05:49:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:23,396 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-11-20 05:49:23,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-11-20 05:49:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 05:49:23,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:23,398 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:23,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:23,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 05:49:23,611 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 27 times [2021-11-20 05:49:23,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867357331] [2021-11-20 05:49:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:23,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:24,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867357331] [2021-11-20 05:49:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867357331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587154576] [2021-11-20 05:49:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:49:24,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:24,556 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:24,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 05:49:25,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-20 05:49:25,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 05:49:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:25,801 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 [2021-11-20 05:49:26,188 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 [2021-11-20 05:49:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:26,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:26,512 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 [2021-11-20 05:49:26,514 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 [2021-11-20 05:49:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:26,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587154576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:26,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:26,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 66 [2021-11-20 05:49:26,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284983890] [2021-11-20 05:49:26,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:26,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 05:49:26,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 05:49:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4120, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 05:49:26,846 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:29,924 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2021-11-20 05:49:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 05:49:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-20 05:49:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:29,925 INFO L225 Difference]: With dead ends: 283 [2021-11-20 05:49:29,925 INFO L226 Difference]: Without dead ends: 182 [2021-11-20 05:49:29,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=477, Invalid=10029, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 05:49:29,926 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 392 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 5034 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 5190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 5034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:29,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 3236 Invalid, 5190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 5034 Invalid, 0 Unknown, 74 Unchecked, 1.7s Time] [2021-11-20 05:49:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-20 05:49:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2021-11-20 05:49:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-11-20 05:49:29,931 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2021-11-20 05:49:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:29,932 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-11-20 05:49:29,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-11-20 05:49:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 05:49:29,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:29,933 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:29,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 05:49:30,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 05:49:30,155 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash -128179809, now seen corresponding path program 28 times [2021-11-20 05:49:30,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:30,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045248384] [2021-11-20 05:49:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:30,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:30,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:30,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045248384] [2021-11-20 05:49:30,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045248384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:30,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616638688] [2021-11-20 05:49:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:49:30,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:30,982 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:31,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 05:49:31,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:49:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-20 05:49:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:49:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:34,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616638688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:34,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:34,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 95 [2021-11-20 05:49:34,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450158183] [2021-11-20 05:49:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:34,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 05:49:34,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 05:49:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=7881, Unknown=0, NotChecked=0, Total=9120 [2021-11-20 05:49:34,753 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 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) [2021-11-20 05:49:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:36,303 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2021-11-20 05:49:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 05:49:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 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 178 [2021-11-20 05:49:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:36,305 INFO L225 Difference]: With dead ends: 190 [2021-11-20 05:49:36,305 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 05:49:36,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2627, Invalid=10713, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 05:49:36,306 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1090 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:36,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1647 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:49:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 05:49:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2021-11-20 05:49:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-11-20 05:49:36,310 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 178 [2021-11-20 05:49:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:36,311 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-11-20 05:49:36,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 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) [2021-11-20 05:49:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-11-20 05:49:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 05:49:36,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:36,313 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:36,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-20 05:49:36,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:36,538 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 29 times [2021-11-20 05:49:36,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374828935] [2021-11-20 05:49:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:36,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:37,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:37,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374828935] [2021-11-20 05:49:37,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374828935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:37,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936438339] [2021-11-20 05:49:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:49:37,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:37,532 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:37,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 05:49:37,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-20 05:49:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 05:49:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:49:39,248 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 16 treesize of output 12 [2021-11-20 05:49:41,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:49:41,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-20 05:49:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 496 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:41,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:44,051 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 [2021-11-20 05:49:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 05:49:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 561 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936438339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:46,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:46,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 125 [2021-11-20 05:49:46,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303179227] [2021-11-20 05:49:46,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:46,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-20 05:49:46,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-20 05:49:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=14497, Unknown=0, NotChecked=0, Total=15500 [2021-11-20 05:49:46,481 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:54,515 INFO L93 Difference]: Finished difference Result 311 states and 312 transitions. [2021-11-20 05:49:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-20 05:49:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-20 05:49:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:54,517 INFO L225 Difference]: With dead ends: 311 [2021-11-20 05:49:54,517 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 05:49:54,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4404 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4339, Invalid=33103, Unknown=0, NotChecked=0, Total=37442 [2021-11-20 05:49:54,519 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2642 mSDsluCounter, 4123 mSDsCounter, 0 mSdLazyCounter, 7130 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2642 SdHoareTripleChecker+Valid, 4197 SdHoareTripleChecker+Invalid, 7642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 7130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:54,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2642 Valid, 4197 Invalid, 7642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 7130 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 05:49:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 05:49:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2021-11-20 05:49:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-11-20 05:49:54,525 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 184 [2021-11-20 05:49:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:54,525 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-11-20 05:49:54,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:49:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-11-20 05:49:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 05:49:54,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:54,527 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:54,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:54,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 05:49:54,744 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:49:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 182762590, now seen corresponding path program 30 times [2021-11-20 05:49:54,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2210495] [2021-11-20 05:49:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:54,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1051 proven. 739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:55,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2210495] [2021-11-20 05:49:55,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2210495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571269454] [2021-11-20 05:49:55,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:49:55,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:55,586 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:55,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 05:49:56,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-20 05:49:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:49:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 05:49:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:56,694 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:49:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:59,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:01,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571269454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:01,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:01,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 104 [2021-11-20 05:50:01,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478082215] [2021-11-20 05:50:01,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:01,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-20 05:50:01,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-20 05:50:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1962, Invalid=8750, Unknown=0, NotChecked=0, Total=10712 [2021-11-20 05:50:01,027 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:02,044 INFO L93 Difference]: Finished difference Result 325 states and 326 transitions. [2021-11-20 05:50:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 05:50:02,045 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-20 05:50:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:02,046 INFO L225 Difference]: With dead ends: 325 [2021-11-20 05:50:02,047 INFO L226 Difference]: Without dead ends: 208 [2021-11-20 05:50:02,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3141, Invalid=12359, Unknown=0, NotChecked=0, Total=15500 [2021-11-20 05:50:02,049 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 178 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:02,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 734 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:50:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-20 05:50:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-11-20 05:50:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-11-20 05:50:02,053 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 200 [2021-11-20 05:50:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-11-20 05:50:02,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-11-20 05:50:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 05:50:02,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:02,056 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:02,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:02,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-20 05:50:02,271 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 275169505, now seen corresponding path program 31 times [2021-11-20 05:50:02,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038021305] [2021-11-20 05:50:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:02,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:03,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038021305] [2021-11-20 05:50:03,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038021305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059204014] [2021-11-20 05:50:03,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:50:03,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:03,517 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:03,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 05:50:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-20 05:50:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:04,610 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 [2021-11-20 05:50:05,083 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 [2021-11-20 05:50:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:05,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:05,483 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 [2021-11-20 05:50:05,484 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 [2021-11-20 05:50:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:05,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059204014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:05,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:05,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 75 [2021-11-20 05:50:05,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706536836] [2021-11-20 05:50:05,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:05,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 05:50:05,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 05:50:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5359, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 05:50:05,840 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 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) [2021-11-20 05:50:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:09,947 INFO L93 Difference]: Finished difference Result 331 states and 332 transitions. [2021-11-20 05:50:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 05:50:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 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 204 [2021-11-20 05:50:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:09,948 INFO L225 Difference]: With dead ends: 331 [2021-11-20 05:50:09,948 INFO L226 Difference]: Without dead ends: 212 [2021-11-20 05:50:09,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 377 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=627, Invalid=13179, Unknown=0, NotChecked=0, Total=13806 [2021-11-20 05:50:09,949 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 557 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 6744 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 4319 SdHoareTripleChecker+Invalid, 6970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 6744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:09,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 4319 Invalid, 6970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 6744 Invalid, 0 Unknown, 108 Unchecked, 2.3s Time] [2021-11-20 05:50:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-20 05:50:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2021-11-20 05:50:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 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) [2021-11-20 05:50:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-11-20 05:50:09,954 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2021-11-20 05:50:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-11-20 05:50:09,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 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) [2021-11-20 05:50:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-11-20 05:50:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 05:50:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:09,957 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:09,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:10,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:10,183 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash -998454300, now seen corresponding path program 32 times [2021-11-20 05:50:10,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:10,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276651664] [2021-11-20 05:50:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:10,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:11,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:11,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276651664] [2021-11-20 05:50:11,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276651664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:11,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674462611] [2021-11-20 05:50:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:50:11,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:11,187 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:11,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 05:50:11,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:50:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:50:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-20 05:50:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:14,036 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 [2021-11-20 05:50:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:14,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674462611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:14,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:14,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2021-11-20 05:50:14,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543202091] [2021-11-20 05:50:14,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:14,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-20 05:50:14,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-20 05:50:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=7353, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 05:50:14,214 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:16,193 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2021-11-20 05:50:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:50:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-20 05:50:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:16,195 INFO L225 Difference]: With dead ends: 220 [2021-11-20 05:50:16,195 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 05:50:16,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 366 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2376, Invalid=10734, Unknown=0, NotChecked=0, Total=13110 [2021-11-20 05:50:16,196 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 814 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 3621 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:16,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2248 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3621 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 05:50:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 05:50:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2021-11-20 05:50:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-11-20 05:50:16,200 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2021-11-20 05:50:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:16,201 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-11-20 05:50:16,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-11-20 05:50:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 05:50:16,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:16,203 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:16,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:16,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:16,422 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -18445128, now seen corresponding path program 33 times [2021-11-20 05:50:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:16,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302783536] [2021-11-20 05:50:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:16,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:17,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:17,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302783536] [2021-11-20 05:50:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302783536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461867172] [2021-11-20 05:50:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:50:17,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:17,643 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:17,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 05:50:18,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-20 05:50:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:50:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-20 05:50:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:19,577 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 [2021-11-20 05:50:20,028 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 [2021-11-20 05:50:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:20,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:20,408 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 [2021-11-20 05:50:20,409 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 [2021-11-20 05:50:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461867172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:20,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 78 [2021-11-20 05:50:20,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625649903] [2021-11-20 05:50:20,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-20 05:50:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-20 05:50:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=5808, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 05:50:20,785 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:25,174 INFO L93 Difference]: Finished difference Result 347 states and 348 transitions. [2021-11-20 05:50:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-20 05:50:25,174 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-20 05:50:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:25,175 INFO L225 Difference]: With dead ends: 347 [2021-11-20 05:50:25,176 INFO L226 Difference]: Without dead ends: 222 [2021-11-20 05:50:25,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 396 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=653, Invalid=14353, Unknown=0, NotChecked=0, Total=15006 [2021-11-20 05:50:25,177 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 581 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 7270 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 4683 SdHoareTripleChecker+Invalid, 7476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 7270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:25,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 4683 Invalid, 7476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 7270 Invalid, 0 Unknown, 82 Unchecked, 2.4s Time] [2021-11-20 05:50:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-20 05:50:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-11-20 05:50:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-11-20 05:50:25,181 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2021-11-20 05:50:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:25,181 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-11-20 05:50:25,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-11-20 05:50:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-20 05:50:25,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:25,183 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:25,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:25,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:25,407 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1579618309, now seen corresponding path program 34 times [2021-11-20 05:50:25,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:25,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490324895] [2021-11-20 05:50:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:25,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 703 proven. 1439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:26,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490324895] [2021-11-20 05:50:26,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490324895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161152758] [2021-11-20 05:50:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:50:26,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:26,605 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 05:50:26,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:50:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:50:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-20 05:50:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 780 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:28,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:29,970 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 [2021-11-20 05:50:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 780 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161152758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:31,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 115 [2021-11-20 05:50:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178509281] [2021-11-20 05:50:31,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-20 05:50:31,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-20 05:50:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1817, Invalid=11523, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 05:50:31,498 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:33,874 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2021-11-20 05:50:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 05:50:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-20 05:50:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:33,875 INFO L225 Difference]: With dead ends: 230 [2021-11-20 05:50:33,875 INFO L226 Difference]: Without dead ends: 230 [2021-11-20 05:50:33,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5618 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3819, Invalid=15641, Unknown=0, NotChecked=0, Total=19460 [2021-11-20 05:50:33,877 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 958 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 4542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:33,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 2649 Invalid, 4542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:50:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-20 05:50:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2021-11-20 05:50:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 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) [2021-11-20 05:50:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-20 05:50:33,880 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 218 [2021-11-20 05:50:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-20 05:50:33,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-20 05:50:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-20 05:50:33,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:33,882 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:33,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:34,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:34,082 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2008611953, now seen corresponding path program 35 times [2021-11-20 05:50:34,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92474046] [2021-11-20 05:50:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:34,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:35,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92474046] [2021-11-20 05:50:35,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92474046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583043518] [2021-11-20 05:50:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:50:35,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:35,495 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:35,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 05:50:35,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-20 05:50:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:50:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-20 05:50:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:37,105 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 [2021-11-20 05:50:37,618 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 [2021-11-20 05:50:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:37,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:37,993 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 [2021-11-20 05:50:37,994 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 [2021-11-20 05:50:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583043518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:38,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 81 [2021-11-20 05:50:38,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680114782] [2021-11-20 05:50:38,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:38,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-20 05:50:38,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-20 05:50:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6275, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 05:50:38,382 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:43,027 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2021-11-20 05:50:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-20 05:50:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-20 05:50:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:43,029 INFO L225 Difference]: With dead ends: 363 [2021-11-20 05:50:43,029 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 05:50:43,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=679, Invalid=15577, Unknown=0, NotChecked=0, Total=16256 [2021-11-20 05:50:43,030 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 715 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 7342 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 4737 SdHoareTripleChecker+Invalid, 7627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 7342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:43,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 4737 Invalid, 7627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 7342 Invalid, 0 Unknown, 135 Unchecked, 2.5s Time] [2021-11-20 05:50:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 05:50:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2021-11-20 05:50:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-11-20 05:50:43,034 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2021-11-20 05:50:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:43,035 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-11-20 05:50:43,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-11-20 05:50:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-20 05:50:43,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:43,036 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:43,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:43,236 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 229928722, now seen corresponding path program 36 times [2021-11-20 05:50:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631675832] [2021-11-20 05:50:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:43,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631675832] [2021-11-20 05:50:44,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631675832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:44,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323351248] [2021-11-20 05:50:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:50:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:44,447 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 05:50:45,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-20 05:50:45,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:50:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 05:50:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:47,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:49,421 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 [2021-11-20 05:50:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323351248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:49,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 121 [2021-11-20 05:50:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802658411] [2021-11-20 05:50:49,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-20 05:50:49,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-20 05:50:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2259, Invalid=12503, Unknown=0, NotChecked=0, Total=14762 [2021-11-20 05:50:49,616 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:51,289 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2021-11-20 05:50:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 05:50:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-20 05:50:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:51,291 INFO L225 Difference]: With dead ends: 240 [2021-11-20 05:50:51,291 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 05:50:51,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4175, Invalid=17287, Unknown=0, NotChecked=0, Total=21462 [2021-11-20 05:50:51,292 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 980 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:51,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1605 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:50:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 05:50:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-11-20 05:50:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-11-20 05:50:51,297 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 228 [2021-11-20 05:50:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:51,297 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-11-20 05:50:51,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-11-20 05:50:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 05:50:51,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:51,298 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:51,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:51,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 05:50:51,499 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:50:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1542886758, now seen corresponding path program 37 times [2021-11-20 05:50:51,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:51,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918540844] [2021-11-20 05:50:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:51,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:53,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918540844] [2021-11-20 05:50:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918540844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:53,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358375441] [2021-11-20 05:50:53,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:50:53,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:53,053 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:53,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 05:50:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-20 05:50:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:54,430 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 [2021-11-20 05:50:54,931 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 [2021-11-20 05:50:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:55,342 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 [2021-11-20 05:50:55,352 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 [2021-11-20 05:50:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:55,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358375441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:55,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:50:55,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 84 [2021-11-20 05:50:55,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842293123] [2021-11-20 05:50:55,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:55,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-20 05:50:55,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-20 05:50:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=6760, Unknown=0, NotChecked=0, Total=6972 [2021-11-20 05:50:55,754 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 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) [2021-11-20 05:51:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:00,930 INFO L93 Difference]: Finished difference Result 379 states and 380 transitions. [2021-11-20 05:51:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-20 05:51:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 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 234 [2021-11-20 05:51:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:00,931 INFO L225 Difference]: With dead ends: 379 [2021-11-20 05:51:00,932 INFO L226 Difference]: Without dead ends: 242 [2021-11-20 05:51:00,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 434 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=705, Invalid=16851, Unknown=0, NotChecked=0, Total=17556 [2021-11-20 05:51:00,933 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 516 mSDsluCounter, 5478 mSDsCounter, 0 mSdLazyCounter, 8738 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 8851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 8738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:00,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 5571 Invalid, 8851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 8738 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 05:51:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-20 05:51:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2021-11-20 05:51:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2021-11-20 05:51:00,938 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2021-11-20 05:51:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:00,939 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2021-11-20 05:51:00,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 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) [2021-11-20 05:51:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2021-11-20 05:51:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-20 05:51:00,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:00,941 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:00,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:01,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-20 05:51:01,147 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2065581783, now seen corresponding path program 38 times [2021-11-20 05:51:01,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:01,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250700294] [2021-11-20 05:51:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:01,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 861 proven. 1715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:02,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250700294] [2021-11-20 05:51:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250700294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647220066] [2021-11-20 05:51:02,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:51:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:02,652 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:02,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 05:51:02,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:51:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-20 05:51:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:02,820 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:51:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 946 proven. 1630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:05,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 1035 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:09,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647220066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:09,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:51:09,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 147 [2021-11-20 05:51:09,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380834326] [2021-11-20 05:51:09,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-20 05:51:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-20 05:51:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2559, Invalid=19197, Unknown=0, NotChecked=0, Total=21756 [2021-11-20 05:51:09,971 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:12,825 INFO L93 Difference]: Finished difference Result 250 states and 251 transitions. [2021-11-20 05:51:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 05:51:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-20 05:51:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:12,827 INFO L225 Difference]: With dead ends: 250 [2021-11-20 05:51:12,827 INFO L226 Difference]: Without dead ends: 250 [2021-11-20 05:51:12,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10316 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4882, Invalid=25220, Unknown=0, NotChecked=0, Total=30102 [2021-11-20 05:51:12,828 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 916 mSDsluCounter, 3507 mSDsCounter, 0 mSdLazyCounter, 5512 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 5512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:12,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 3606 Invalid, 5692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 5512 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:51:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-20 05:51:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2021-11-20 05:51:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-11-20 05:51:12,834 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 238 [2021-11-20 05:51:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:12,834 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-11-20 05:51:12,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-11-20 05:51:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-20 05:51:12,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:12,836 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:12,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-20 05:51:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 05:51:13,051 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1261679165, now seen corresponding path program 39 times [2021-11-20 05:51:13,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570198775] [2021-11-20 05:51:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:13,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:14,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570198775] [2021-11-20 05:51:14,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570198775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808121892] [2021-11-20 05:51:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:51:14,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:14,631 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:14,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 05:51:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-20 05:51:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-20 05:51:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:17,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:51:17,908 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 [2021-11-20 05:51:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:17,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:18,333 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 [2021-11-20 05:51:18,335 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 [2021-11-20 05:51:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808121892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:18,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:51:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 87 [2021-11-20 05:51:18,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821622922] [2021-11-20 05:51:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:18,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-20 05:51:18,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-20 05:51:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=7263, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 05:51:18,750 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:24,402 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2021-11-20 05:51:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-20 05:51:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-20 05:51:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:24,404 INFO L225 Difference]: With dead ends: 395 [2021-11-20 05:51:24,404 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 05:51:24,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=731, Invalid=18175, Unknown=0, NotChecked=0, Total=18906 [2021-11-20 05:51:24,405 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 536 mSDsluCounter, 5949 mSDsCounter, 0 mSdLazyCounter, 9533 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 6046 SdHoareTripleChecker+Invalid, 9650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:24,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 6046 Invalid, 9650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9533 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 05:51:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 05:51:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-11-20 05:51:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-11-20 05:51:24,408 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2021-11-20 05:51:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:24,408 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-11-20 05:51:24,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-11-20 05:51:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-20 05:51:24,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:24,410 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:24,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:24,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 05:51:24,635 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 956513856, now seen corresponding path program 40 times [2021-11-20 05:51:24,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355658822] [2021-11-20 05:51:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:24,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:26,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355658822] [2021-11-20 05:51:26,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355658822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741695167] [2021-11-20 05:51:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:51:26,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:26,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:26,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:26,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 05:51:26,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:51:26,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-20 05:51:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:28,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:30,383 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 21 treesize of output 17 [2021-11-20 05:51:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741695167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:32,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:51:32,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 130 [2021-11-20 05:51:32,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131338201] [2021-11-20 05:51:32,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:32,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-20 05:51:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-20 05:51:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2324, Invalid=14706, Unknown=0, NotChecked=0, Total=17030 [2021-11-20 05:51:32,433 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:35,534 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2021-11-20 05:51:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-20 05:51:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-11-20 05:51:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:35,536 INFO L225 Difference]: With dead ends: 260 [2021-11-20 05:51:35,536 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 05:51:35,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7250 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4860, Invalid=19946, Unknown=0, NotChecked=0, Total=24806 [2021-11-20 05:51:35,539 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1878 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:35,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 3529 Invalid, 6172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:51:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 05:51:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 255. [2021-11-20 05:51:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 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) [2021-11-20 05:51:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2021-11-20 05:51:35,544 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 248 [2021-11-20 05:51:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:35,544 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2021-11-20 05:51:35,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2021-11-20 05:51:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-20 05:51:35,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:35,546 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:35,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:35,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-20 05:51:35,771 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash 838164, now seen corresponding path program 41 times [2021-11-20 05:51:35,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:35,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430765533] [2021-11-20 05:51:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:35,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:37,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430765533] [2021-11-20 05:51:37,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430765533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312893055] [2021-11-20 05:51:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:51:37,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:37,400 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:37,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 05:51:37,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-20 05:51:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-20 05:51:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:39,442 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 [2021-11-20 05:51:39,971 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 [2021-11-20 05:51:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:40,406 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 [2021-11-20 05:51:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 05:51:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312893055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:40,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:51:40,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 90 [2021-11-20 05:51:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058768971] [2021-11-20 05:51:40,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-20 05:51:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-20 05:51:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=7784, Unknown=0, NotChecked=0, Total=8010 [2021-11-20 05:51:40,837 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:46,897 INFO L93 Difference]: Finished difference Result 411 states and 412 transitions. [2021-11-20 05:51:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-20 05:51:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-11-20 05:51:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:46,899 INFO L225 Difference]: With dead ends: 411 [2021-11-20 05:51:46,899 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 05:51:46,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 472 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=757, Invalid=19549, Unknown=0, NotChecked=0, Total=20306 [2021-11-20 05:51:46,900 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 691 mSDsluCounter, 6577 mSDsCounter, 0 mSdLazyCounter, 10325 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 10586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 10325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:46,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 6678 Invalid, 10586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 10325 Invalid, 0 Unknown, 113 Unchecked, 3.4s Time] [2021-11-20 05:51:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 05:51:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2021-11-20 05:51:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2021-11-20 05:51:46,905 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2021-11-20 05:51:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:46,905 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2021-11-20 05:51:46,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2021-11-20 05:51:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 05:51:46,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:46,907 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:46,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-20 05:51:47,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:47,122 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash 126578263, now seen corresponding path program 42 times [2021-11-20 05:51:47,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:47,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303451478] [2021-11-20 05:51:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:47,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1035 proven. 2015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:48,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303451478] [2021-11-20 05:51:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303451478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900471561] [2021-11-20 05:51:48,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:51:48,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:48,521 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:48,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 05:51:50,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-20 05:51:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-20 05:51:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1128 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:53,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:55,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-20 05:51:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1128 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:55,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900471561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:55,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:51:55,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 136 [2021-11-20 05:51:55,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421596361] [2021-11-20 05:51:55,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:55,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-20 05:51:55,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-20 05:51:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2862, Invalid=15770, Unknown=0, NotChecked=0, Total=18632 [2021-11-20 05:51:55,716 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:57,728 INFO L93 Difference]: Finished difference Result 270 states and 271 transitions. [2021-11-20 05:51:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 05:51:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-20 05:51:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:57,730 INFO L225 Difference]: With dead ends: 270 [2021-11-20 05:51:57,730 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 05:51:57,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7900 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5261, Invalid=21799, Unknown=0, NotChecked=0, Total=27060 [2021-11-20 05:51:57,733 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1655 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:57,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 1892 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:51:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 05:51:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2021-11-20 05:51:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-11-20 05:51:57,738 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 258 [2021-11-20 05:51:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:57,738 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-11-20 05:51:57,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:51:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-11-20 05:51:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 05:51:57,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:57,740 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:57,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:57,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:57,959 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:51:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1268757269, now seen corresponding path program 43 times [2021-11-20 05:51:57,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026229634] [2021-11-20 05:51:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:57,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:51:59,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026229634] [2021-11-20 05:51:59,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026229634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090393520] [2021-11-20 05:51:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:51:59,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:59,694 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:59,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 05:51:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 168 conjunts are in the unsatisfiable core [2021-11-20 05:51:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:01,362 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 [2021-11-20 05:52:01,922 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 [2021-11-20 05:52:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:02,362 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 [2021-11-20 05:52:02,364 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 26 treesize of output 22 [2021-11-20 05:52:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:02,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090393520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:02,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:02,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 93 [2021-11-20 05:52:02,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415853626] [2021-11-20 05:52:02,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:02,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 05:52:02,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 05:52:02,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8323, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 05:52:02,823 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:09,225 INFO L93 Difference]: Finished difference Result 427 states and 428 transitions. [2021-11-20 05:52:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-20 05:52:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-20 05:52:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:09,227 INFO L225 Difference]: With dead ends: 427 [2021-11-20 05:52:09,227 INFO L226 Difference]: Without dead ends: 272 [2021-11-20 05:52:09,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=783, Invalid=20973, Unknown=0, NotChecked=0, Total=21756 [2021-11-20 05:52:09,229 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 843 mSDsluCounter, 6906 mSDsCounter, 0 mSdLazyCounter, 10818 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 7011 SdHoareTripleChecker+Invalid, 11154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 10818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:09,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 7011 Invalid, 11154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 10818 Invalid, 0 Unknown, 158 Unchecked, 3.6s Time] [2021-11-20 05:52:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-20 05:52:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-20 05:52:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-11-20 05:52:09,234 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 264 [2021-11-20 05:52:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:09,234 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-11-20 05:52:09,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-11-20 05:52:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-20 05:52:09,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:09,237 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:09,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-20 05:52:09,456 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:52:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416430, now seen corresponding path program 44 times [2021-11-20 05:52:09,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:09,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846755650] [2021-11-20 05:52:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:09,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1128 proven. 2174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:11,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:11,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846755650] [2021-11-20 05:52:11,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846755650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:11,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748737602] [2021-11-20 05:52:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:11,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:11,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:11,098 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:11,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 05:52:11,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:52:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:11,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 142 conjunts are in the unsatisfiable core [2021-11-20 05:52:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:13,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:15,216 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 [2021-11-20 05:52:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:15,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748737602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:15,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:15,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 115 [2021-11-20 05:52:15,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577403906] [2021-11-20 05:52:15,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:15,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-20 05:52:15,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-20 05:52:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=11715, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 05:52:15,476 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:18,479 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2021-11-20 05:52:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 05:52:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-11-20 05:52:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:18,481 INFO L225 Difference]: With dead ends: 280 [2021-11-20 05:52:18,481 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 05:52:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5622 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3771, Invalid=17109, Unknown=0, NotChecked=0, Total=20880 [2021-11-20 05:52:18,483 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1451 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 5298 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 5564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 5298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:18,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 3369 Invalid, 5564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 5298 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:52:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 05:52:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 275. [2021-11-20 05:52:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-11-20 05:52:18,489 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 268 [2021-11-20 05:52:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:18,489 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-11-20 05:52:18,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-11-20 05:52:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-20 05:52:18,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:18,491 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:18,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:18,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-20 05:52:18,706 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:52:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash -388191550, now seen corresponding path program 45 times [2021-11-20 05:52:18,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119202453] [2021-11-20 05:52:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:18,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:20,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119202453] [2021-11-20 05:52:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119202453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028782569] [2021-11-20 05:52:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:52:20,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:20,781 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:20,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 05:52:25,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-20 05:52:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-20 05:52:25,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:27,213 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 [2021-11-20 05:52:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:27,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:28,379 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 [2021-11-20 05:52:28,380 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 [2021-11-20 05:52:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:28,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028782569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:28,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:28,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 98 [2021-11-20 05:52:28,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964536604] [2021-11-20 05:52:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-20 05:52:28,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-20 05:52:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=9258, Unknown=0, NotChecked=0, Total=9506 [2021-11-20 05:52:28,840 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:35,536 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2021-11-20 05:52:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-20 05:52:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-20 05:52:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:35,537 INFO L225 Difference]: With dead ends: 443 [2021-11-20 05:52:35,537 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 05:52:35,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 508 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=820, Invalid=23050, Unknown=0, NotChecked=0, Total=23870 [2021-11-20 05:52:35,538 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 608 mSDsluCounter, 7234 mSDsCounter, 0 mSdLazyCounter, 11378 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 7343 SdHoareTripleChecker+Invalid, 11676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 11378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:35,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 7343 Invalid, 11676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 11378 Invalid, 0 Unknown, 165 Unchecked, 3.7s Time] [2021-11-20 05:52:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 05:52:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2021-11-20 05:52:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-11-20 05:52:35,542 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2021-11-20 05:52:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:35,543 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-11-20 05:52:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-11-20 05:52:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-20 05:52:35,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:35,545 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:35,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:35,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-20 05:52:35,770 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:52:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1901490299, now seen corresponding path program 46 times [2021-11-20 05:52:35,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:35,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397003791] [2021-11-20 05:52:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:35,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1225 proven. 2339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:37,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397003791] [2021-11-20 05:52:37,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397003791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296407700] [2021-11-20 05:52:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:52:37,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:37,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:37,454 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:37,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-20 05:52:38,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:52:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-20 05:52:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:40,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:42,496 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 21 treesize of output 17 [2021-11-20 05:52:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296407700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:44,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:44,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 145 [2021-11-20 05:52:44,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391975763] [2021-11-20 05:52:44,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:44,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-20 05:52:44,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-20 05:52:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2894, Invalid=18276, Unknown=0, NotChecked=0, Total=21170 [2021-11-20 05:52:44,702 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:47,991 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2021-11-20 05:52:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-20 05:52:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2021-11-20 05:52:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:47,992 INFO L225 Difference]: With dead ends: 290 [2021-11-20 05:52:47,992 INFO L226 Difference]: Without dead ends: 290 [2021-11-20 05:52:47,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9089 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6027, Invalid=24773, Unknown=0, NotChecked=0, Total=30800 [2021-11-20 05:52:47,994 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 2241 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 5724 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 6164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 5724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:47,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 3657 Invalid, 6164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 5724 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:52:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-20 05:52:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 285. [2021-11-20 05:52:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-11-20 05:52:47,998 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 278 [2021-11-20 05:52:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-11-20 05:52:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-11-20 05:52:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-20 05:52:48,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:48,001 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:48,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-20 05:52:48,214 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:52:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash 469783449, now seen corresponding path program 47 times [2021-11-20 05:52:48,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:48,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572885221] [2021-11-20 05:52:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:48,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:50,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572885221] [2021-11-20 05:52:50,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572885221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510303220] [2021-11-20 05:52:50,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:52:50,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:50,191 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:50,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-20 05:52:51,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-20 05:52:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:51,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 178 conjunts are in the unsatisfiable core [2021-11-20 05:52:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:52,801 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 [2021-11-20 05:52:53,388 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 [2021-11-20 05:52:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:53,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:53,890 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 [2021-11-20 05:52:53,892 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 [2021-11-20 05:52:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:54,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510303220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:54,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:54,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2021-11-20 05:52:54,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119317693] [2021-11-20 05:52:54,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:54,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-20 05:52:54,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-20 05:52:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9455, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 05:52:54,392 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:01,594 INFO L93 Difference]: Finished difference Result 459 states and 460 transitions. [2021-11-20 05:53:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 05:53:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2021-11-20 05:53:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:01,596 INFO L225 Difference]: With dead ends: 459 [2021-11-20 05:53:01,597 INFO L226 Difference]: Without dead ends: 292 [2021-11-20 05:53:01,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 529 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=835, Invalid=23971, Unknown=0, NotChecked=0, Total=24806 [2021-11-20 05:53:01,599 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 482 mSDsluCounter, 7824 mSDsCounter, 0 mSdLazyCounter, 12162 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 7937 SdHoareTripleChecker+Invalid, 12530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 12162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:01,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 7937 Invalid, 12530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 12162 Invalid, 0 Unknown, 258 Unchecked, 4.0s Time] [2021-11-20 05:53:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-20 05:53:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2021-11-20 05:53:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-11-20 05:53:01,604 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2021-11-20 05:53:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-11-20 05:53:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-11-20 05:53:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-20 05:53:01,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:01,606 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:01,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:01,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-20 05:53:01,830 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 05:53:01,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 204759196, now seen corresponding path program 48 times [2021-11-20 05:53:01,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163411272] [2021-11-20 05:53:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:01,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1326 proven. 2510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:03,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163411272] [2021-11-20 05:53:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163411272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328950717] [2021-11-20 05:53:03,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:53:03,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:03,848 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:03,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-20 05:53:08,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-20 05:53:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 05:53:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:08,055 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:53:08,554 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 [2021-11-20 05:53:10,336 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-11-20 05:53:10,336 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 27 treesize of output 24 [2021-11-20 05:53:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 81 proven. 82 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-20 05:53:10,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 05:53:13,001 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 37 treesize of output 35 [2021-11-20 05:53:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-20 05:53:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328950717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:13,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:13,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 76 [2021-11-20 05:53:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959534893] [2021-11-20 05:53:13,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:13,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 05:53:13,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 05:53:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=5069, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 05:53:13,567 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:17,843 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2021-11-20 05:53:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-20 05:53:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-11-20 05:53:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:17,844 INFO L225 Difference]: With dead ends: 294 [2021-11-20 05:53:17,844 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 05:53:17,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11260 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2604, Invalid=34838, Unknown=0, NotChecked=0, Total=37442 [2021-11-20 05:53:17,845 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 159 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:17,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1497 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1162 Invalid, 0 Unknown, 523 Unchecked, 0.4s Time] [2021-11-20 05:53:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 05:53:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 05:53:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 05:53:17,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 288 [2021-11-20 05:53:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:53:17,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 05:53:17,847 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 05:53:17,849 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-20 05:53:17,849 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-20 05:53:17,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-20 05:53:17,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-20 05:53:18,053 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:18,054 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 05:53:18,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:53:18 BoogieIcfgContainer [2021-11-20 05:53:18,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 05:53:18,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:53:18,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:53:18,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:53:18,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:45" (3/4) ... [2021-11-20 05:53:18,060 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 05:53:18,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-20 05:53:18,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-20 05:53:18,071 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 05:53:18,071 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 05:53:18,102 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 05:53:18,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:53:18,102 INFO L158 Benchmark]: Toolchain (without parser) took 333751.27ms. Allocated memory was 88.1MB in the beginning and 377.5MB in the end (delta: 289.4MB). Free memory was 51.0MB in the beginning and 211.9MB in the end (delta: -160.9MB). Peak memory consumption was 126.5MB. Max. memory is 16.1GB. [2021-11-20 05:53:18,103 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory is still 68.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:53:18,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 408.87ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 50.8MB in the beginning and 90.7MB in the end (delta: -39.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:53:18,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.97ms. Allocated memory is still 119.5MB. Free memory was 90.7MB in the beginning and 89.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:53:18,103 INFO L158 Benchmark]: Boogie Preprocessor took 26.10ms. Allocated memory is still 119.5MB. Free memory was 89.1MB in the beginning and 88.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:53:18,104 INFO L158 Benchmark]: RCFGBuilder took 505.28ms. Allocated memory is still 119.5MB. Free memory was 87.5MB in the beginning and 76.5MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 05:53:18,104 INFO L158 Benchmark]: TraceAbstraction took 332717.47ms. Allocated memory was 119.5MB in the beginning and 377.5MB in the end (delta: 257.9MB). Free memory was 76.0MB in the beginning and 214.5MB in the end (delta: -138.5MB). Peak memory consumption was 120.4MB. Max. memory is 16.1GB. [2021-11-20 05:53:18,104 INFO L158 Benchmark]: Witness Printer took 45.16ms. Allocated memory is still 377.5MB. Free memory was 214.5MB in the beginning and 211.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:53:18,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory is still 68.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 408.87ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 50.8MB in the beginning and 90.7MB in the end (delta: -39.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.97ms. Allocated memory is still 119.5MB. Free memory was 90.7MB in the beginning and 89.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.10ms. Allocated memory is still 119.5MB. Free memory was 89.1MB in the beginning and 88.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 505.28ms. Allocated memory is still 119.5MB. Free memory was 87.5MB in the beginning and 76.5MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 332717.47ms. Allocated memory was 119.5MB in the beginning and 377.5MB in the end (delta: 257.9MB). Free memory was 76.0MB in the beginning and 214.5MB in the end (delta: -138.5MB). Peak memory consumption was 120.4MB. Max. memory is 16.1GB. * Witness Printer took 45.16ms. Allocated memory is still 377.5MB. Free memory was 214.5MB in the beginning and 211.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 332.6s, OverallIterations: 59, TraceHistogramMax: 28, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 120.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31511 SdHoareTripleChecker+Valid, 63.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31511 mSDsluCounter, 113623 SdHoareTripleChecker+Invalid, 52.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2686 IncrementalHoareTripleChecker+Unchecked, 110305 mSDsCounter, 6008 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 174972 IncrementalHoareTripleChecker+Invalid, 183666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6008 mSolverCounterUnsat, 3318 mSDtfsCounter, 174972 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18571 GetRequests, 13554 SyntacticMatches, 102 SemanticMatches, 4915 ConstructedPredicates, 0 IntricatePredicates, 38 DeprecatedPredicates, 122756 ImplicationChecksByTransitivity, 158.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=289occurred in iteration=58, InterpolantAutomatonStates: 2313, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 59 MinimizatonAttempts, 323 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 24.2s SatisfiabilityAnalysisTime, 174.3s InterpolantComputationTime, 15452 NumberOfCodeBlocks, 15452 NumberOfCodeBlocksAsserted, 513 NumberOfCheckSat, 22973 ConstructedInterpolants, 584 QuantifiedInterpolants, 211594 SizeOfPredicates, 580 NumberOfNonLiveVariables, 24967 ConjunctsInSsa, 4482 ConjunctsInUnsatCore, 157 InterpolantComputations, 10 PerfectInterpolantSequences, 48661/205902 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-20 05:53:18,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52af59bb-b66e-4c07-b89e-efa862fa4b1b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE